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                              OFFICE BUILDING LEASE

                                     BETWEEN

                              KILROY REALTY, L.P.,

                         a Delaware limited partnership

                                    LANDLORD

                                       AND

                             THE RYLAND GROUP, INC.,

                             a Maryland corporation

                                     TENANT

<PAGE> 19



                               TABLE OF CONTENTS
                               -----------------



1.    BASIC LEASE TERMS..........................................1

2.    PREMISES AND COMMON AREAS..................................2

3.    TERM.......................................................3

4.    POSSESSION.................................................5

5.    RENT.......................................................6

6.    OPERATING EXPENSES.........................................6

7.    DELETED....................................................8

8.    USE........................................................8

9.    NOTICES....................................................9

10.   BROKERS....................................................9

11.   SURRENDER; HOLDING OVER....................................9

12.   TAXES ON TENANT'S PROPERTY................................10

13.   ALTERATIONS...............................................10

14.   REPAIRS...................................................12

15.   LIENS.....................................................13

16.   ENTRY BY LANDLORD.........................................13

17.   UTILITIES AND SERVICES....................................14

18.   ASSUMPTION OF RISK AND INDEMNIFICATION....................14

19.   INSURANCE.................................................15

20.   DAMAGE OR DESTRUCTION.....................................17

21.   EMINENT DOMAIN............................................18

22.   DEFAULTS AND REMEDIES.....................................19

23.   LANDLORD'S DEFAULT.  .....................................22

24.   ASSIGNMENT AND SUBLETTING.................................22

25.   SUBORDINATION.............................................24

26.   ESTOPPEL CERTIFICATE......................................25

27.   INTENTIONALLY OMITTED.....................................25

28.   RULES AND REGULATIONS.....................................25

29.   MODIFICATION AND CURE RIGHTS OF LANDLORD'S MORTGAGEES AND
      LESSORS...................................................25

30.   DEFINITION OF LANDLORD....................................26
                                  
31.   WAIVER....................................................26

                                    
                                       (i)
<PAGE> 20



32.   PARKING...................................................26

33.   FORCE MAJEURE.............................................27

34.   SIGNS.....................................................28

35.   LIMITATION ON LIABILITY...................................28

36.   FINANCIAL STATEMENTS......................................28

37.   QUIET ENJOYMENT...........................................29

38.   MISCELLANEOUS.............................................29

39.   EXECUTION OF LEASE........................................30


ADDENDUM

EXHIBITS:

A-I   Site Plan
A-II  Outline of Floor Plan of Premises
B     Rentable Square Feet and Usable Square Feet
C     Work Letter Agreement
      Schedule 1  Description of Base Building
      Schedule 2  Work Schedule
D     Notice of Lease Term Dates and Tenant's Percentage
E     Definition of Operating Expenses
F     Standards for Utilities and Services
G     Estoppel Certificate
H     Rules and Regulations


                                      (ii)
<PAGE> 21


                              OFFICE BUILDING LEASE

This OFFICE BUILDING LEASE ("Lease") is entered into as of the _______ day of
December, 1999 by and between Kilroy Realty, L.P., a Delaware limited
partnership ("Landlord"), and The Ryland Group, Inc., a Maryland corporation
("Tenant").

1.    BASIC LEASE TERMS.  For purposes of this Lease, the following terms have
the following definitions and meanings:

(a)   Landlord:  Kilroy Realty, L.P., a Delaware limited partnership.

(b)   Landlord's Address (For Notices):

      2250 East Imperial Highway, Suite 1200
      El Segundo, California  90245
      Attention:  Chief Legal Officer

or such other place as Landlord may from time to time designate by notice to
Tenant.

(c)   Tenant:  The Ryland Group, Inc., a Maryland corporation.

(d)   Tenant's Address (For Notices):  Ryland Mortgage, 6300 Canoga Avenue,
14th Floor, Woodland Hills, California  91367, Attention:  Bob Cunnion or such
other place as Tenant may from time to time designate by notice to Landlord.

(e)   Development:  The parcel(s) of real property located within and
consisting of a portion of Calabasas Park Centre, located in the City of
Calabasas (the "City"), County of Los Angeles (the "County"), State of
California ("State"), as shown on the site plan attached hereto as
Exhibit "A-I".

(f) Building:  The four (4) story westernmost office building located within the
Development,   which  Building  contains   approximately  One  Hundred  Thousand
(100,000)  Rentable  Square Feet  (subject to  adjustment as provided in Exhibit
"B"), with the street address of 24025 Park Sorrento, Calabasas, California.

(g) Premises: Collectively, those certain premises known as Suite 400 consisting
of  approximately  25,324 Rentable Square Feet and 24,702 Usable Square Feet and
Suite 100  consisting  of  approximately  7,622  Rentable  Square Feet and 6,686
Usable  Square Feet as  generally  shown on the floor plans  attached  hereto as
Exhibit "A-II".

(h) Tenant's  Percentage:  Tenant's  percentage  of the Building on an aggregate
Rentable  Square Foot basis,  initially  is  thirty-two  and  95/100ths  percent
(32.95%),  subject to final determination as provided in Exhibit "B" and Exhibit
"D".

(i)   Original Term:  Six (6) years and four (4) months, subject to Tenant's
right to extend the Term pursuant to the provisions of Paragraph 3 hereof.

(j)   (i)   Estimated Commencement Date:  July 1, 2000
      (ii)  Estimated Expiration Date:  October 31, 2006.

(k)   Commencement Date:  The date on which the Term of this Lease will
commence as determined in accordance with the provisions of Exhibit "C" and                                                   
as stated on Exhibit "D".
             
(l) Initial  Monthly Base Rent:  Two Dollars and Fifty Cents  ($2.50)  times the
Rentable  Square Feet  contained  within the Premises,  subject to adjustment as
provided in  subparagraph  1(m) below and as  otherwise  provided in this Lease,
including the Addendum hereto.

(m)   Adjustment to Monthly Base Rent:  Intentionally omitted.



                                      -1-
<PAGE> 22


(n)   Operating Expense Allowance:  Operating Expense Allowance means Tenant's
Percentage of Operating Expenses as described in Paragraph 6 below which
Landlord has included in Monthly Base Rent, which, for purposes of this
Lease, will be an amount equal to the Operating Expenses incurred for
calendar year 2000 (the "Base Year").

(o)   Security Deposit:  None

(p) Tenant Improvements: All tenant improvements installed or to be installed by
Landlord or Tenant  within the Premises to prepare the  Premises  for  occupancy
pursuant to the terms of the Work Letter  Agreement  attached  hereto as Exhibit
"C".

(q)   Tenant Improvement Allowance:  Thirty-Five Dollars ($35) per Usable
Square Foot of the Premises, to be applied as provided in the Work Letter
Agreement attached hereto as Exhibit "C".
                             
(r)   Permitted Use:  General office uses and no other use without the express
written consent of Landlord, which consent Landlord may withhold in its sole
and absolute discretion.

(s)  Parking:  Tenant  may use a number of  parking  permits  equal to three (3)
permits per each one  thousand  (1,000)  Usable  Square Feet within the Premises
during  the  Original  Term,  at no cost to  Tenant,  subject  to the  terms and
conditions of Paragraph 32 below and the Rules and Regulations regarding parking
contained in Exhibit "H".  One-third (1/3) of Tenant's  parking permits shall be
for Tenant's  use in the parking  space  locations as depicted on Exhibit  "A-I"
attached hereto; all other parking permits shall be unreserved parking permits.

(t)   Broker(s):      CB Richard Ellis, representing Landlord

                      Travers Realty, representing Tenant

(u)   Guarantor(s):  Intentionally omitted.

(v) Interest Rate:  shall mean the greater of ten percent (10%) per annum or two
percent  (2%) in excess of the prime  lending or  reference  rate of Wells Fargo
Bank N.A. or any successor bank in effect on the twenty-fifth  (25th) day of the
calendar month  immediately  prior to the event giving rise to the Interest Rate
imposition;  provided,  however,  the Interest  Rate will in no event exceed the
maximum interest rate permitted to be charged by applicable law.

(w) Exhibits:  "A" through "H",  inclusive,  which Exhibits are attached to this
Lease and  incorporated  herein by this  reference.  As provided in  Paragraph 3
below,  a completed  version of Exhibit "D" will be  delivered  to Tenant  after
Landlord delivers possession of the Premises to Tenant.

(x) Addendum Paragraphs:
1 through 3, inclusive, which Addendum Paragraphs are attached to this Lease and
incorporated herein by this reference.

This Paragraph 1 represents a summary of the basic terms and definitions of this
Lease.  In the event of any  inconsistency  between the terms  contained in this
Paragraph 1 and any  specific  provision  of this  Lease,  the terms of the more
specific provision shall prevail.

2.    PREMISES AND COMMON AREAS.

(a)  Premises.  Landlord  hereby  leases to Tenant and Tenant hereby leases from
Landlord the Premises as improved or to be improved with the Tenant Improvements
described in the Work Letter  Agreement,  a copy of which is attached  hereto as
Exhibit "C".

(b) Mutual  Covenants.  Landlord and Tenant agree that the letting and hiring of
the  Premises  is upon  and  subject  to the  terms,  covenants  and  conditions
contained  in this Lease and each  party  covenants  as a  material  part of the
consideration  for this Lease to keep and perform their  respective  obligations
under this Lease.


                                      -2-
<PAGE> 23


(c) Tenant's Use of Common  Areas.  During the Term of this Lease,  Tenant shall
have the  nonexclusive  right to use in common with  Landlord  and all  persons,
firms  and  corporations  conducting  business  in  the  Development  and  their
respective customers,  guests, licensees,  invitees,  subtenants,  employees and
agents  (collectively,  "Development  Occupants"),  subject to the terms of this
Lease,  the Rules  and  Regulations  referenced  in  Paragraph  28 below and all
covenants,   conditions  and  restrictions   now  or  hereafter   affecting  the
Development,  the following  common areas of the Building and/or the Development
(collectively, the "Common Areas"):

(i) The Building's  common  entrances,  hallways,  lobbies,  public restrooms on
multi-tenant floors, elevators,  stairways and accessways, loading docks, ramps,
drives and platforms and any passageways and serviceways thereto, and the common
pipes, conduits, wires and appurtenant equipment within the Building which serve
the  Premises  (collectively,  "Building  Common  Areas");  and

(ii) The parking facilities of the Development which serve the Building (subject
to the  provisions of Exhibit "H"),  loading and unloading  areas,  trash areas,
roadways,  sidewalks,  walkways,  parkways,  driveways,  landscaped areas, plaza
areas,   fountains  and  similar  areas  and  facilities   situated  within  the
Development  and  appurtenant  to the  Building  which are not  reserved for the
exclusive use of any Development  Occupants  (collectively,  "Development Common
Areas").

(d) Landlord's Reservation of Rights. Provided Tenant's use of and access to the
Premises and parking to be provided to Tenant under this Lease is not interfered
with in an unreasonable  manner,  Landlord reserves for itself and for all other
owner(s) and operator(s) of the Development  Common Areas and the balance of the
Development, the right from time to time to: (i) install, use, maintain, repair,
replace and relocate pipes,  ducts,  conduits,  wires and appurtenant meters and
equipment above the ceiling surfaces, below the floor surfaces, within the walls
and in the central core areas of the  Building;  (ii) make changes to the design
and  layout  of the  Development,  including,  without  limitation,  changes  to
buildings,  driveways,  entrances,  loading and  unloading  areas,  direction of
traffic,  landscaped areas and walkways,  and, subject to the parking provisions
contained in Paragraph 32 and Exhibit "H",  parking  permits and parking  areas;
and (iii) use or close  temporarily the Building  Common Areas,  the Development
Common Areas and/or other  portions of the  Development  while engaged in making
improvements,  repairs or alterations to the Building,  the Development,  or any
portion thereof.


3. TERM.

(a)  Original  Term.  The term of this Lease  ("Original  Term") will be for the
period designated in subparagraph 1(i), commencing on the Commencement Date, and
ending  on the last day of the  month in which  the  expiration  of such  period
occurs,  including any  extensions of the Term pursuant to any provision of this
Lease or written agreement of the parties. Notwithstanding the foregoing, if the
Commencement  Date falls on any day other than the first day of a calendar month
then the Term of this  Lease  will be  measured  from the first day of the month
following  the month in which the  Commencement  Date occurs.  Each  consecutive
twelve  (12)  month  period  of  the  Term  of  this  Lease,  commencing  on the
Commencement  Date,  will be  referred to herein as a "Lease  Year".  Landlord's
Notice of Lease Term Dates and Tenant's  Percentage  ("Notice"),  in the form of
Exhibit "D" attached hereto, will set forth the Commencement Date, the date upon
which the Term of this Lease  shall end,  the  Rentable  Square  Feet within the
Premises  and the  Building,  and Tenant's  Percentage  and will be delivered to
Tenant after Landlord delivers  possession of the Premises to Tenant. The Notice
will be  binding  upon  Tenant  unless  Tenant  objects to the Notice in writing
within five (5) days of Tenant's receipt of the Notice.

(b) Extension.  Subject to the terms of this Paragraph 3, Landlord hereby grants
to Tenant one (1) option ("Extension  Option") to extend the original Term as to
the entire  Premises  only for an additional  period of five (5) years  ("Option
Term"), on the same terms, covenants and conditions as provided for in the Lease
for the original  Term,  except that the economic  Lease terms during the Option
Term  shall be as set  forth in this  Paragraph  3.

(c) Rent for Option Term.  Monthly Base Rent at the beginning of the Option Term
shall be adjusted to equal the "fair market"  determined based on the parameters
described in subparagraph 3(e) below;  provided,  however, in no event shall the
Monthly Base Rent be decreased  after such adjustment to an amount less than the
Monthly Base Rent payable in the month immediately preceding the Option Term.


                                      -3-
<PAGE> 24


(d) Exercise of Option.  The Extension  Option must be exercised,  if at all, by
written  notice  ("Extension  Notice")  delivered by Tenant to Landlord no later
than  the  date  which  is four  hundred  twenty-five  (425)  days  prior to the
expiration of the original Term.

(e)  Determination  of Monthly Base Rent.  The "fair  market"  determination  as
described  in this  Paragraph  3 shall mean the annual  amount per square  foot,
projected during the Option Term (including any applicable rent increases during
the Option Term), that a willing, comparable, renewal tenant (excluding sublease
and assignment transactions),  would pay and that a willing, comparable landlord
would accept for comparable  space in a comparable Class "A" building located in
the  City  of  Calabasas  or  Warner  Center  (the  "Comparison  Market  Area").
Comparable  space  shall  consist  of  such  space  of  comparable  quality  and
improvements  as are located  within the Building,  taking into account the age,
quality,  layout of the  Premises,  the parking  rights  available to Tenant and
Tenant's  Authorized Users, and also taking into account items that professional
real estate brokers  customarily  consider,  such as who is paying for taxes and
insurance,  rental rates, availability,  tenant size and other factors typically
considered  by  Landlord  or lessors of similar  facilities,  and shall  include
consideration  given  to  tenant  improvement  allowance,  free  rent  or  other
concessions but only to the extent such  concessions are generally  available to
renewal tenants in the Comparison Market Area.

(f) Tenant  Review Period and Election to Cancel  Exercise of Extension  Option.
Within  thirty  (30) days  following  Tenant's  due and timely  exercise  of the
Extension Option as provided herein,  Landlord shall provide Tenant with written
notice of Landlord's  good faith  determination  of fair market for the Premises
for the  applicable  Option Term  determined  by taking into account the matters
described  in  subparagraph  3(e) above.  Within  sixty (60) days  ("Negotiation
Period")  after receipt of Landlord's  notice of the fair market  determination,
Landlord  and Tenant  shall  meet in a good faith  effort to agree upon the fair
market for the  Premises  for the Option Term but without any  obligation  to so
agree.  If  Landlord  and Tenant  fail to reach  agreement  on such fair  market
determination  prior to the expiration of the  Negotiation  Period (the "Outside
Agreement  Date"),  then Tenant,  within five (5) days of the  expiration of the
Negotiation  Period,  may cancel and nullify the Extension  Option by delivering
written notice of such election to Landlord. In the event of Tenant's failure to
so elect to cancel and nullify  the  Extension  Option  within such five (5) day
period,   Landlord  and  Tenant  shall  submit  their   respective   good  faith
determinations  of fair market for the Premises for the relevant  period of time
to appraisal in accordance with the provisions below.

(g)  Appointment of  Appraisers.  Landlord and Tenant shall each appoint one (1)
independent,  unaffiliated appraiser who is by profession a licensed real estate
broker who has been active  over the five (5) year period  ending on the date of
such appointment in the leasing of office space located in the Comparison Market
Area. Each such appraiser shall be appointed  within fifteen (15) days after the
Outside  Agreement  Date.  If the two (2)  appraisers so appointed do not within
fifteen (15) days of the date of the appointment of the last appointed appraiser
agree upon  whether  Landlord's  or  Tenant's  last  submitted  (on the  Outside
Agreement Date) fair market determination,  then said appraisers within five (5)
days  thereafter  shall  agree upon and appoint a third  appraiser  who shall be
qualified  under the same  criteria  for  qualification  of the  initial two (2)
appraisers.

(h) Third  Appraiser.  The third appraiser  shall determine  whether the parties
shall use Landlord's or Tenant's last submitted (on the Outside  Agreement Date)
fair market  determination,  and shall notify Landlord and Tenant  thereof.  The
determination  of the third  appraiser  shall be limited  solely to the issue of
whether  Landlord's or Tenant's last submitted (on the Outside  Agreement  Date)
fair market determination is the closest to the actual fair market for such area
as  solely   determined  by  the  third  appraiser,   taking  into  account  the
requirements specified above. The decision of the third appraiser shall be final
and binding upon Landlord and Tenant.

(i) Failure to Appoint Appraiser.  If either Landlord or Tenant fails to appoint
an appraiser within the time period specified in subparagraph  3(g) hereinabove,
the appraiser appointed by one of them shall, within fifteen (15) days following
the date on which the party  failing  to appoint  an  appraiser  could have last
appointed such  appraiser,  reach a decision based upon the procedures set forth
above (i.e., by selecting  either  Landlord's or Tenant's last submitted [on the
Outside Agreement Date] fair market determination) and shall notify Landlord and
Tenant thereof,  and such  appraiser's  decision shall be final and binding upon
Landlord and Tenant.

                                      -4-
<PAGE> 25

(j) Failure to Appoint Third  Appraiser.  If the two (2) appraisers  selected by
Landlord  and Tenant  fail to agree upon and timely  appoint a third  appraiser,
both  appraisers  shall be  dismissed  and the  matter  to be  decided  shall be
forthwith  submitted  to  arbitration  under  the  provisions  of  the  American
Arbitration  Association  based upon the  procedures  set forth above (i.e.,  by
selecting either Landlord's or Tenant's last submitted [on the Outside Agreement
Date] fair market determination).

(k) Delay In Determination of Fair Market Rent. If the process described in this
Paragraph 3 has not  resulted  in a selection  of  Landlord's  or Tenant's  fair
market  determinations  by the commencement of the applicable  Option Term, then
the average of the fair market  determinations  estimated  by Landlord or Tenant
shall  be used  until a final  decision  has  been  reached  by the  appropriate
appraiser,  with an  appropriate  rental  credit and other  adjustments  for any
overpayments of Base Rent or other amounts if the appropriate  appraiser selects
Tenant's  estimate  of fair  market.

(l)  Cost of  Appraisers.  The  cost  of each  party's  appraiser  shall  be the
responsibility of the party selecting such appraiser,  and the cost of the third
appraiser  (and,  if  necessary,  arbitration)  shall be shared by Landlord  and
Tenant equally.

(m)   Deleted.

(n)   Deleted.

(o) Effect of  Default.  Tenant  shall have no right to exercise  the  Extension
Option,  notwithstanding  any provision of the grant of the Extension  Option to
the contrary,  and Tenant's exercise of the Extension Option may be nullified by
Landlord  and deemed of no further  force or effect,  if (i) Tenant  shall be in
default of any monetary obligation or material non-monetary obligation under the
terms of this Lease as of Tenant's  exercise of the Extension Option in question
or at any time after the  exercise of such Option and prior to the  commencement
of the Option Term, or (ii) Landlord has given Tenant two (2) or more notices of
default,  whether or not such defaults are subsequently cured, during any twelve
(12) consecutive month period of the Lease.

4.    POSSESSION.

(a)  Delivery  of  Possession.  Landlord  agrees to  deliver  possession  of the
Premises to Tenant in  accordance  with the terms of the Work  Letter  Agreement
attached hereto as Exhibit "C". Notwithstanding the foregoing, Landlord will not
be obligated to deliver possession of the Premises to Tenant (but Tenant will be
liable for rent if Landlord can otherwise  deliver the Premises to Tenant) until
Landlord has received from Tenant all of the following: (i) a copy of this Lease
fully  executed by Tenant and the  guaranty of Tenant's  obligations  under this
Lease,  if any,  executed by the  Guarantor(s);  (ii) the first  installment  of
Monthly  Base  Rent;   (iii)  executed   copies  of  policies  of  insurance  or
certificates  thereof as required under Paragraph 19 of this Lease;  (iv) copies
of all governmental  permits and authorizations,  if any, required in connection
with Tenant's  operation of its business within the Premises;  and (v) if Tenant
is a corporation or partnership, such evidence of due formation, valid existence
and authority as Landlord may  reasonably  require,  which may include,  without
limitation, a certificate of good standing,  certificate of secretary,  articles
of incorporation, statement of partnership, or other similar documentation.

(b) Condition of Premises. Prior to the Commencement Date and in accordance with
the Work Letter  Agreement  attached hereto as Exhibit "C",  Landlord and Tenant
will jointly conduct a walk-through  inspection of the Premises and will jointly
prepare  a  punch-list  ("Punch-List")  of items  required  to be  installed  by
Landlord under the Work Letter Agreement which require  finishing or correction.
The  Punch-List  will not include any items of damage to the Premises  caused by
Tenant's move-in or early entry, if permitted, which damage will be corrected or
repaired by Landlord, at Tenant's expense or, at Landlord's election, by Tenant,
at Tenant's expense. Other than the items specified in the Punch-List, by taking
possession of the Premises,  Tenant will be deemed to have accepted the Premises
in its condition on the date of delivery of possession and to have  acknowledged
that the Tenant  Improvements have been installed as required by the Work Letter
Agreement  and that  there  are no  additional  items  needing  work or  repair.
Landlord  will cause all items in the  Punch-List  to be repaired  or  corrected
within thirty (30) days  following the  preparation of the Punch-List or as soon
as practicable after the preparation of the Punch-List. Tenant acknowledges that
neither  Landlord  nor any  agent of  Landlord  has made any  representation  or
warranty with respect to the  Premises,  the Building,  the  Development  or any
portions  thereof or with respect to the  suitability of same for the conduct of
Tenant's  business and Tenant  further  acknowledges  that Landlord will have no
obligation  to construct or complete any  additional  buildings or  improvements
within the Development.

                                      -5-
<PAGE> 26

(c)  Representations  By Landlord.  Landlord  hereby  represents and warrants as
follows:  (i) the Building,  as of the  Commencement  Date shall comply with all
applicable  covenants or restrictions  of record and applicable  building codes,
regulations  and  ordinances  in  effect  on the  Commencement  Date;  provided,
however,  this warranty shall not apply to any Tenant  Improvements which Tenant
shall cause to be  installed  within the  Premises;  and (ii)  Landlord  has not
caused any  Hazardous  Materials  to be brought  upon,  stored,  used,  handled,
generated,  released  or disposed of on, in,  under or about the  Premises,  the
Building and/or the Common Areas. In the event Tenant does not provide  Landlord
with  a  written  notice  of  a  non-compliance  with  the  representations  and
warranties  set forth in this  subparagraph  4(c)  within  six (6) months of the
Commencement Date,  Landlord's  representations and warranties set forth in this
subparagraph 4(c) shall be deemed to have no further force or effect.

5. RENT.

(a) Monthly Base Rent.  Tenant  agrees to pay Landlord the Monthly Base Rent for
the Premises  (subject to adjustment as hereinafter  provided) in advance on the
first day of each calendar month during the Term without prior notice or demand,
except  that Tenant  agrees to pay the Monthly  Base Rent for the first month of
the Term  directly  to  Landlord  concurrently  with  Tenant's  delivery  of the
executed Lease to Landlord. If the Term of this Lease commences or ends on a day
other than the first day of a calendar month, then the rent for such period will
be  prorated in the  proportion  that the number of days this Lease is in effect
during such period  bears to the number of days in such month.  All rent must be
paid to Landlord, without any deduction or offset, in lawful money of the United
States of America, at the address designated by Landlord or to such other person
or at such other place as Landlord  may from time to time  designate in writing.
Monthly Base Rent will be adjusted  during the Term of this Lease as provided in
subparagraph  l(m).

(b)  Additional  Rent.  All amounts and charges to be paid by Tenant  hereunder,
including,  without  limitation,  payments for  Operating  Expenses,  insurance,
repairs and parking,  will be  considered  additional  rent for purposes of this
Lease,  and the  word  "rent"  as  used in this  Lease  will  include  all  such
additional  rent unless the context  specifically  or clearly  implies that only
Monthly Base Rent is intended.

(c)   Late Payments.  Late payments of Monthly Base Rent and/or any item of
additional rent will be subject to interest and a late charge as provided in
subparagraph 22(f) below.

6.    OPERATING EXPENSES.

(a)  Operating  Expenses.  In addition to Monthly Base Rent,  commencing  on the
first anniversary of the Commencement Date and continuing throughout the Term of
this Lease,  Tenant agrees to pay Landlord as additional rent in accordance with
the terms of this  Paragraph 6,  Tenant's  Percentage  of Operating  Expenses as
defined in Exhibit "E"  attached  hereto to the extent  Tenant's  Percentage  of
Operating Expenses exceeds Tenant's  Operating Expense  Allowance.

(b) Estimate Statement. Prior to the Commencement Date and on or about March 1st
of each  subsequent  calendar year during the Term of this Lease,  Landlord will
endeavor  to  deliver  to  Tenant a  statement  ("Estimate  Statement")  wherein
Landlord will estimate  both the Operating  Expenses and Tenant's  Percentage of
Operating  Expenses  for the then  current  calendar  year.  If the  estimate of
Tenant's  Percentage  of Operating  Expenses in the Estimate  Statement  exceeds
Tenant's  Operating  Expense  Allowance,  Tenant  agrees  to  pay  Landlord,  as
"Additional  Rent",  one-twelfth  (1/12th) of such excess each month thereafter,
beginning  with the next  installment  of rent due,  until such time as Landlord
issues a revised Estimate Statement or the Estimate Statement for the succeeding
calendar year;  except that,  concurrently with the regular monthly rent payment
next due following the receipt of each such Estimate Statement, Tenant agrees to
pay Landlord an amount equal to one monthly installment of such excess (less any
applicable  Operating  Expenses already paid) multiplied by the number of months
from January,  in the current  calendar  year, to the month of such rent payment
next due,  all months  inclusive.  If at any time during the Term of this Lease,
but not more often than quarterly,  Landlord reasonably determines that Tenant's
Percentage of Operating  Expenses for the current  calendar year will be greater
than the amount set forth in the then current Estimate  Statement,  Landlord may
issue a revised Estimate Statement and Tenant agrees to pay Landlord, within ten
(10) days of receipt of the revised Estimate  Statement,  the difference between
the amount owed by Tenant under such revised  Estimate  Statement and the amount
owed by Tenant under the original Estimate Statement for the portion of the then
current  calendar  year  which  has  expired.  Thereafter  Tenant  agrees to pay
Tenant's  Percentage  of  Operating  Expenses  based  on such  revised  Estimate
Statement until Tenant receives the next calendar year's Estimate Statement or a
new revised  Estimate  Statement  for the current  calendar  year.  In the event
Tenant's  Percentage  of Operating  Expenses for any calendar  year is less than
Tenant's  Operating Expense  Allowance,  Tenant will not be entitled to a credit
against any rent,  additional  rent or Tenant's  Percentage of future  Operating
Expenses payable hereunder.


                                      -6-
<PAGE> 27

(c) Actual Statement. By March 1st of each calendar year during the Term of this
Lease  (commencing  March 1 in the  calendar  year  following  the base year for
Operating  Expenses,  if applicable),  Landlord will also endeavor to deliver to
Tenant a  statement  ("Actual  Statement")  which  states the  actual  Operating
Expenses for the preceding  calendar year. If the Actual Statement  reveals that
Tenant's  Percentage  of the actual  Operating  Expenses  is more than the total
Additional  Rent  paid by  Tenant  for  Operating  Expenses  on  account  of the
preceding  calendar year, Tenant agrees to pay Landlord the difference in a lump
sum  within ten (10) days of  receipt  of the  Actual  Statement.  If the Actual
Statement reveals that Tenant's  Percentage of the actual Operating  Expenses is
less than the Additional  Rent paid by Tenant for Operating  Expenses on account
of the preceding calendar year,  Landlord will credit any overpayment toward the
next monthly installment(s) of Tenant's Percentage of the Operating Expenses due
under  this  Lease.

(d)  Miscellaneous.  Any delay or failure by Landlord in delivering any Estimate
Statement or Actual Statement pursuant to this Paragraph 6 will not constitute a
waiver of its right to require an increase in rent nor will it relieve Tenant of
its  obligations  pursuant to this  Paragraph  6, except that Tenant will not be
obligated  to make any  payments  based on such  Estimate  Statement  or  Actual
Statement until ten (10) days after receipt of such Estimate Statement or Actual
Statement. Even though the Term has expired and Tenant has vacated the Premises,
when the  final  determination  is made of  Tenant's  Percentage  of the  actual
Operating Expenses for the year in which this Lease terminates, Tenant agrees to
promptly pay any increase due over the estimated expenses paid and,  conversely,
any  overpayment  made in the event said  expenses  decrease  shall  promptly be
rebated by Landlord to Tenant.  Such  obligation  will be a continuing one which
will survive the expiration or earlier  termination of this Lease.  Prior to the
expiration or sooner termination of the Lease Term and Landlord's  acceptance of
Tenant's surrender of the Premises, Landlord will have the right to estimate the
actual  Operating  Expenses for the then current  Lease Year and to collect from
Tenant prior to Tenant's surrender of the Premises,  Tenant's  Percentage of any
excess of such actual Operating  Expenses over the estimated  Operating Expenses
paid by Tenant in such Lease Year.

(e) Tenant's Audit Rights. Notwithstanding anything to the contrary contained in
this Lease,  if Tenant  reasonably  disputes any amounts set forth in any Actual
Statement  described  above in this  Paragraph  6, Tenant will have the right no
later than sixty (60) days  following  receipt of an Actual  Statement  to cause
Landlord's general ledger of accounts with respect to the immediately  preceding
calendar  year only to be audited by a nationally  recognized  firm of certified
public  accountants  reasonably  approved by Landlord,  at no cost or expense to
Landlord,  by a certified public accountant  mutually acceptable to Landlord and
Tenant and which has prior experience in the review of financial  statements and
which shall not have provided primary  accounting  services to Tenant within the
last three (3) years and which shall not be retained by Tenant on a  contingency
basis;  provided,  however,  Tenant shall not have the right to perform any such
audit  more than one (1) time for any  calendar  year  during  the  Lease  Term,
provided  further,  if any other tenant(s) shall have already initiated an audit
of the Operating  Expenses  during such calendar  year,  Landlord shall have the
right at its option to limit  Tenant's  audit to a review of such other audit(s)
and any reasonable and specific  concerns Tenant may have with any such audit(s)
and Tenant shall not be entitled to reopen Landlord's general ledger of accounts
regarding  Operating Expenses for such calendar year except with respect to such
reasonable and specific concerns of Tenant  concerning such other audit(s).  Any
audit conducted by or on behalf of Tenant shall be performed  within ninety (90)
days and shall be  conducted  at  Landlord's  office  during  Landlord's  normal
business hours and in the manner so as to minimize  interference with Landlord's
business operations.  Landlord shall have no obligation and Tenant shall have no
right to make photocopies of any of Landlord's ledgers, invoices or other items.
Tenant's  audit  shall be  limited to an on-site  review of  Landlord's  general
ledger of accounts.  The amounts  payable under this  Paragraph 6 by Landlord to
Tenant or to  Tenant  to  Landlord,  as the case may be,  will be  appropriately
adjusted on the basis of such audit. If such audit discloses an overstatement of
Operating Expenses in excess of five percent (5%) for such calendar year, Tenant
will receive a credit against Tenant's future Operating Expense  obligations for
the reasonable  costs of such audit;  otherwise the cost of such audit including
Landlord's costs incurred in complying with such audit shall be borne by Tenant.
Tenant  agrees to keep,  and to cause in its account and  employee to keep,  all
information  revealed  by any audit of  Landlord's  books and  records  strictly
confidential  and not to  disclose  any  such  information  or  permit  any such
information to be disclosed to anyone other than Landlord,  unless  compelled to
do so by a court of law.

                                      -7-
<PAGE> 28


7.    DELETED.

8.    USE.

(a) Tenant's Use of the  Premises.  The Premises may be used for the use or uses
set forth in  subparagraph  1(r)  only,  and  Tenant  will not use or permit the
Premises to be used for any other purpose  without the prior written  consent of
Landlord,  which  consent  Landlord  may  withhold  in  its  sole  and  absolute
discretion.  Nothing in this Lease will be deemed to give  Tenant any  exclusive
right  to such  use in the  Building  or the  Development.

(b)  Compliance.  At Tenant's  sole cost and expense,  Tenant agrees to procure,
maintain and hold available for Landlord's inspection, all governmental licenses
and permits required for the proper and lawful conduct of Tenant's business from
the Premises,  if any. Tenant agrees not to use, alter or occupy the Premises or
allow the Premises to be used,  altered or occupied in violation of, and Tenant,
at its sole cost and  expense,  agrees to use and occupy the  Premises and cause
the Premises to be used and occupied in compliance  with:  (i) any and all laws,
statutes,  zoning  restrictions,  ordinances,  rules,  regulations,  orders  and
rulings now or hereafter in force and any requirements of any insurer, insurance
authority or duly  constituted  public authority  having  jurisdiction  over the
Premises,  the Building or the Development  now or hereafter in force,  (ii) the
requirements of the Board of Fire Underwriters and any other similar body, (iii)
the  Certificate of Occupancy  issued for the Building.  Tenant shall not use or
permit the Premises to be used for any purpose  which would cause a violation of
any recorded  covenants,  conditions  and  restrictions  and similar  regulatory
agreements,  if any,  which  affect the use,  occupation  or  alteration  of the
Premises, the Building and/or the Development.  Tenant agrees to comply with the
Rules and Regulations  referenced in Paragraph 28 below. Tenant agrees not to do
or permit  anything to be done in or about the Premises which will in any manner
obstruct  or  interfere  with the rights of other  tenants or  occupants  of the
Development,  or injure or unreasonably annoy them, or use or allow the Premises
to be used for any unlawful or unreasonably objectionable purpose. Tenant agrees
not to cause,  maintain or permit any  nuisance or waste in, on,  under or about
the  Premises or  elsewhere  within the  Development.  Notwithstanding  anything
contained in this Lease to the contrary,  all  transferable  development  rights
related in any way to the  Development  are and will remain  vested in Landlord,
and Tenant hereby waives any rights thereto.

(c)  Hazardous  Materials.  Except for  ordinary  and  general  office  supplies
typically used in the ordinary course of business within office buildings,  such
as copier toner, liquid paper, glue, ink and common household cleaning materials
(some or all of which may  constitute  "Hazardous  Materials" as defined in this
Lease),  Tenant  agrees not to cause or permit  any  Hazardous  Materials  to be
brought upon, stored, used, handled, generated,  released or disposed of on, in,
under or about the Premises, the Building, the Common Areas or any other portion
of the  Development by Tenant,  its agents,  employees,  subtenants,  assignees,
licensees,  contractors or invitees (collectively,  "Tenant's Parties"), without
the prior written  consent of Landlord,  which consent  Landlord may withhold in
its sole and absolute discretion.  Upon the expiration or earlier termination of
this Lease, Tenant agrees to promptly remove from the Premises, the Building and
the Development,  at its sole cost and expense, any and all Hazardous Materials,
including  any equipment or systems  containing  Hazardous  Materials  which are
installed,  brought upon, stored, used, generated or released upon, in, under or
about the Premises,  the Building  and/or the Development or any portion thereof
by Tenant or any of Tenant's  Parties.  To the fullest extent  permitted by law,
Tenant agrees to promptly indemnify,  protect, defend and hold harmless Landlord
and Landlord's partners, officers, directors,  employees, agents, successors and
assigns (collectively,  "Landlord Indemnified Parties") from and against any and
all claims, damages,  judgments,  suits, causes of action, losses,  liabilities,
penalties, fines, expenses and costs (including,  without limitation,  clean-up,
removal,  remediation and restoration  costs, sums paid in settlement of claims,
attorneys' fees, consultant fees and expert fees and court costs) which arise or
result  from the  presence of  Hazardous  Materials  on, in,  under or about the
Premises,  the Building or any other  portion of the  Development  and which are
caused or  permitted  by Tenant or any of  Tenant's  Parties.  Tenant  agrees to
promptly notify Landlord of any release of Hazardous  Materials at the Premises,
the Building or any other portion of the Development  which Tenant becomes aware
of during the Term of this Lease,  whether caused by Tenant or any other persons
or  entities.  In the event of any  release  of  Hazardous  Materials  caused or
permitted by Tenant or any of Tenant's  Parties,  Landlord shall have the right,
but not the obligation,  to cause Tenant to immediately  take all steps Landlord
deems necessary or appropriate to remediate such release and prevent any similar
future release to the satisfaction of Landlord and Landlord's  mortgagee(s).  As
used in this Lease,  the term "Hazardous  Materials"  shall mean and include any
hazardous  or  toxic  materials,  substances  or  wastes  as  now  or  hereafter
designated under any law, statute, ordinance, rule, regulation,  order or ruling
of any  agency  of  the  State,  the  United  States  Government  or  any  local
governmental  authority,  including,  without limitation,  asbestos,  petroleum,
petroleum  hydrocarbons  and petroleum based products,  urea  formaldehyde  foam
insulation,   polychlorinated   biphenyls   ("PCBs"),   and   freon   and  other
chlorofluorocarbons.  The provisions of this  subparagraph 8(c) will survive the
expiration or earlier termination of this Lease.

                                      -8-
<PAGE> 29

9. NOTICES.  Any notice  required or permitted to be given  hereunder must be in
writing and may be given by personal delivery  (including  delivery by overnight
courier or an express  mailing  service) or by mail,  if sent by  registered  or
certified mail.  Notices to Tenant shall be sufficient if delivered to Tenant at
the address  designated in  subparagraph  1(d) and notices to Landlord  shall be
sufficient if delivered to Landlord at the address  designated  in  subparagraph
1(b).  Either  party may  specify a  different  address  for notice  purposes by
written  notice to the other,  except that the Landlord may in any event use the
Premises as Tenant's address for notice purposes.

10.  BROKERS.  The parties  acknowledge  that the broker(s) who negotiated  this
Lease are stated in subparagraph 1(t). Each party represents and warrants to the
other, that, to its knowledge,  no other broker,  agent or finder (a) negotiated
or was instrumental in negotiating or consummating this Lease on its behalf, and
(b) is or might be entitled to a commission or  compensation  in connection with
this  Lease.  Landlord  and Tenant each agree to  promptly  indemnify,  protect,
defend and hold harmless the other from and against any and all claims, damages,
judgments,  suits,  causes of action,  losses,  liabilities,  penalties,  fines,
expenses and costs  (including  attorneys' fees and court costs)  resulting from
any breach by the indemnifying party of the foregoing representation, including,
without  limitation,  any claims that may be  asserted  by any broker,  agent or
finder  undisclosed by the  indemnifying  party.  The foregoing mutual indemnity
shall  survive  the  expiration  or  earlier  termination  of  this  Lease.

11. SURRENDER; HOLDING OVER.

(a) Surrender.  The voluntary or other  surrender of this Lease by Tenant,  or a
mutual  cancellation  thereof,  shall not constitute a merger, and shall, at the
option of Landlord, operate as an assignment to Landlord of any or all subleases
or  subtenancies.  Upon the  expiration  or earlier  termination  of this Lease,
Tenant agrees to peaceably surrender the Premises to Landlord broom clean and in
a state of first-class order,  repair and condition,  ordinary wear and tear and
casualty  damage (if this Lease is  terminated as a result  thereof  pursuant to
Paragraph 20) excepted,  with all of Tenant's  personal property and Alterations
(as defined in Paragraph  13) removed  from the Premises to the extent  required
under Paragraph 13 and all damage caused by such removal repaired as required by
Paragraph 13. Prior to the date Tenant is to actually  surrender the Premises to
Landlord,  Tenant agrees to give Landlord  reasonable  prior notice of the exact
date Tenant will surrender the Premises so that Landlord and Tenant can schedule
a  walk-through  of the  Premises to review the  condition  of the  Premises and
identify  the  Alterations  and personal  property  which are to remain upon the
Premises and which items Tenant is to remove,  as well as any repairs  Tenant is
to make upon surrender of the Premises.  The delivery of keys to any employee of
Landlord  or to  Landlord's  agent or any  employee  thereof  alone  will not be
sufficient  to  constitute  a  termination  of this Lease or a surrender  of the
Premises.

                                      -9-
<PAGE> 30

(b) Holding  Over.  Tenant will not be permitted to hold over  possession of the
Premises  after the  expiration or earlier  termination  of the Term without the
express written consent of Landlord,  which consent Landlord may withhold in its
sole and  absolute  discretion.  If Tenant  holds over after the  expiration  or
earlier termination of the Term, Landlord may, at its option,  treat Tenant as a
tenant at  sufferance  only,  and such  continued  occupancy  by Tenant shall be
subject to all of the terms,  covenants and conditions of this Lease,  so far as
applicable, except that the Monthly Base Rent for any such holdover period shall
be equal to the greater of (i) one  hundred  twenty-five  percent  (125%) of the
Monthly Base Rent in effect under this Lease immediately prior to such holdover,
or (ii) the then currently  scheduled  rental rate for  comparable  space in the
Building,  in either event prorated on a daily basis.  Acceptance by Landlord of
rent after such expiration or earlier  termination  will not result in a renewal
of this Lease. The foregoing  provisions of this Paragraph 11 are in addition to
and do not affect  Landlord's  right of re-entry or any rights of Landlord under
this Lease or as otherwise  provided by law. If Tenant  fails to  surrender  the
Premises upon the expiration of this Lease in accordance  with the terms of this
Paragraph  11 despite  demand to do so by  Landlord,  Tenant  agrees to promptly
indemnify,  protect, defend and hold Landlord harmless from all claims, damages,
judgments,  suits,  causes of action,  losses,  liabilities,  penalties,  fines,
expenses and costs  (including  attorneys' fees and costs),  including,  without
limitation, costs and expenses incurred by Landlord in returning the Premises to
the  condition  in which  Tenant  was to  surrender  it and  claims  made by any
succeeding tenant founded on or resulting from Tenant's failure to surrender the
Premises.  The provisions of this subparagraph 11(b) will survive the expiration
or earlier termination of this Lease.

12. TAXES ON TENANT'S  PROPERTY.  Tenant agrees to pay before  delinquency,  all
taxes and  assessments  (real and  personal)  levied  against  (a) any  personal
property or trade fixtures placed by Tenant in or about the Premises  (including
any increase in the assessed  value of the Premises  based upon the value of any
such personal  property or trade fixtures);  and (b) any Tenant  Improvements or
Alterations in the Premises  (whether  installed  and/or paid for by Landlord or
Tenant) to the extent such items are  assessed  at a  valuation  higher than the
valuation  at  which  tenant  improvements  conforming  to  Landlord's  building
standard tenant improvements are assessed.  If any such taxes or assessments are
levied  against  Landlord or Landlord's  property,  Landlord may,  after written
notice to Tenant  (and under  proper  protest if  requested  by Tenant) pay such
taxes and  assessments,  in which event Tenant agrees to reimburse  Landlord all
amounts paid by Landlord within ten (10) business days after demand by Landlord;
provided,  however,  Tenant, at its sole cost and expense,  will have the right,
with  Landlord's   cooperation,   to  bring  suit  in  any  court  of  competent
jurisdiction  to recover  the amount of any such taxes and  assessments  so paid
under protest.

13.  ALTERATIONS.  After installation of the initial Tenant Improvements for the
Premises pursuant to Exhibit "C", Tenant may, at its sole cost and expense, make
alterations,   additions,   improvements   and   decorations   to  the  Premises
(collectively,  "Alterations")  subject  to and upon  the  following  terms  and
conditions:

(a)  Prohibited  Alterations.  Tenant may not make any  Alterations  which:  (i)
affect any area  outside the  Premises;  (ii) affect the  Building's  structure,
equipment, services or systems, or the proper functioning thereof, or Landlord's
access  thereto;  (iii) affect the outside  appearance,  character or use of the
Building  or the  Building  Common  Areas;  (iv) in the  reasonable  opinion  of
Landlord,  lessen the value of the  Building;  or (v) will  violate or require a
change in any occupancy certificate  applicable to the Premises.

(b) Landlord's  Approval.  Before  proceeding with any Alterations which are not
prohibited  in  subparagraph  13(a) above,  Tenant must first obtain  Landlord's
written  approval of the plans,  specifications  and working  drawings  for such
Alterations,  which approval  Landlord will not unreasonably  withhold or delay;
provided,  however,  Landlord's prior approval will not be required for any such
Alterations which are not prohibited by subparagraph  13(a) above and which cost
less than Fifty Thousand  Dollars  ($50,000.00) in the aggregate in any calendar
year as long as (i) Tenant  delivers to Landlord  notice and a copy of any final
plans, specifications and working drawings for any such Alterations at least ten
(10)  days  prior to  commencement  of the  work  thereof,  and  (ii) the  other
conditions  of  this   Paragraph  13  are   satisfied,   excluding  any  bonding
requirements, but including, without limitation, conforming to Landlord's rules,
regulations  and insurance  requirements  which govern  contractors.  Landlord's
approval of plans,  specifications  and/or working drawings for Alterations will
not create any  responsibility  or  liability  on the part of Landlord for their
completeness,  design sufficiency,  or compliance with applicable permits, laws,
rules and regulations of governmental agencies or authorities.  In approving any
Alterations,  Landlord  reserves the right to require Tenant to provide Landlord
with  additional  reasonable  security  for the removal of such  Alterations  by
Tenant as may be  required by this Lease.  Landlord  reserves  the right to post
Notices of  Non-Responsibility  with  respect to any  Alterations  performed  by
Tenant.

                                      -10-
<PAGE> 31

(c)  Contractors.  Alterations  may be made or installed only by contractors and
subcontractors  which have been approved by Landlord,  which  approval  Landlord
will not unreasonably withhold or delay;  provided,  however,  Landlord reserves
the right to require that  Landlord's  contractor  for the Building be given the
opportunity  to  bid  for  any  Alteration  work.  Before  proceeding  with  any
Alterations,  Tenant agrees to provide Landlord with ten (10) days prior written
notice and Tenant's  contractors  must obtain and maintain,  on behalf of Tenant
and at Tenant's sole cost and expense:  (i) all necessary  governmental  permits
and approvals for the commencement and completion of such Alterations;  and (ii)
if requested by Landlord, a completion and lien indemnity bond, or other surety,
reasonably  satisfactory  to  Landlord  for  such  Alterations.  Throughout  the
performance  of  any  Alterations,   Tenant  agrees  to  obtain,  or  cause  its
contractors  to obtain,  workers  compensation  insurance and general  liability
insurance in compliance with the provisions of Paragraph 19 of this Lease.

(d) Manner of Performance.  All Alterations must be performed: (i) in accordance
with  the  approved  plans,  specifications  and  working  drawings;  (ii)  in a
lien-free and first-class and workmanlike  manner;  (iii) in compliance with all
applicable permits, laws, statutes,  ordinances, rules, regulations,  orders and
rulings now or hereafter in effect and imposed by any governmental  agencies and
authorities  which  assert  jurisdiction;  (iv)  in such a  manner  so as not to
interfere with the occupancy of any other tenant in the Building, nor impose any
additional  expense upon nor delay Landlord in the  maintenance and operation of
the Building;  and (v) at such times, in such manner,  and subject to such rules
and regulations as Landlord may from time to time reasonably designate.

(e) Ownership.  The Tenant  Improvements,  including,  without  limitation,  all
affixed  sinks,  dishwashers,  microwave  ovens  and  other  fixtures,  and  all
Alterations  will become the  property  of Landlord  and will remain upon and be
surrendered  with the  Premises at the end of the Term of this Lease;  provided,
however,  Landlord may, by written notice delivered to Tenant  concurrently with
Landlord's approval of the final working drawings for any Alterations,  identify
those Alterations which Landlord will require Tenant to remove at the end of the
Term of this Lease. Landlord may also require Tenant to remove Alterations which
Landlord did not have the  opportunity  to approve as provided in this Paragraph
13. If Landlord  requires Tenant to remove any Alterations,  Tenant, at its sole
cost and expense,  agrees to remove the identified  Alterations on or before the
expiration  or  earlier  termination  of this Lease and repair any damage to the
Premises caused by such removal (or, at Landlord's option,  Tenant agrees to pay
to Landlord all of Landlord's costs of such removal and repair).

(f) Plan  Review.  Tenant  agrees  to pay  Landlord,  as  additional  rent,  the
reasonable  costs of professional  services and costs for general  conditions of
Landlord's  third party  consultants if utilized by Landlord (but not Landlord's
"in-house"  personnel)  for  review of all  plans,  specifications  and  working
drawings  for any  Alterations,  within ten (10)  business  days after  Tenant's
receipt of invoices  either  from  Landlord or such  consultants.  In  addition,
Tenant agrees to pay Landlord, within ten (10) business days after completion of
any   Alterations,   a  fee  to  cover   Landlord's  costs  of  supervising  and
administering the installation of any non-structural  Alterations, in the amount
of three percent (3%) of the cost of such Alterations, but in no event less than
Two Hundred  Fifty Dollars  ($250.00).

(g)  Personal  Property.  All articles of personal  property  owned by Tenant or
installed by Tenant at its expense in the Premises  (including Tenant's business
and  trade  fixtures,  furniture,  movable  partitions  and  equipment  [such as
telephones,  copy  machines,  computer  terminals,  refrigerators  and facsimile
machines])  will be and remain the  property  of Tenant,  and must be removed by
Tenant from the Premises,  at Tenant's  sole cost and expense,  on or before the
expiration  or earlier  termination  of this Lease.  Tenant agrees to repair any
damage caused by such removal at its cost on or before the expiration or earlier
termination of this Lease.


                                      -11-
<PAGE> 32


(h)  Removal of  Alterations.  If Tenant  fails to remove by the  expiration  or
earlier  termination  of  this  Lease  all  of  its  personal  property,  or any
Alterations  identified  by Landlord for removal,  Landlord  may, at its option,
treat such failure as a hold-over pursuant to subparagraph  11(b) above,  and/or
Landlord may (without  liability to Tenant for loss thereof) treat such personal
property and/or Alterations as abandoned and, at Tenant's sole cost and expense,
and in addition to Landlord's other rights and remedies under this Lease, at law
or in  equity:  (a remove and store  such  items;  and/or (b) upon ten (10) days
prior notice to Tenant,  sell,  discard or otherwise  dispose of all or any such
items at private  or public  sale for such  price as  Landlord  may obtain or by
other  commercially  reasonable  means.  Tenant shall be liable for all costs of
disposition of Tenant's  abandoned property and Landlord shall have no liability
to Tenant with respect to any such abandoned property.  Landlord agrees to apply
the  proceeds  of any sale of any such  property  to any amounts due to Landlord
under this Lease from Tenant  (including  Landlord's  attorneys'  fees and other
costs  incurred in the removal,  storage  and/or sale of such  items),  with any
remainder to be paid to Tenant.

14.   REPAIRS.

(a)  Landlord's  Obligations.   Landlord  agrees  to  repair  and  maintain  the
structural portions of the Building and the plumbing, heating,  ventilating, air
conditioning,   elevator  and  electrical  systems  installed  or  furnished  by
Landlord,  unless such  maintenance  and repairs are (i)  attributable  to items
installed in Tenant's  Premises which are above standard  interior  improvements
(such as, for example, custom lighting, special HVAC and/or electrical panels or
systems,  kitchen or restroom facilities and appliances constructed or installed
within Tenant's Premises) or (ii) caused in part or in whole by the act, neglect
or omission of any duty by Tenant, its agents, servants,  employees or invitees,
in which case Tenant will pay to Landlord,  as additional  rent,  the reasonable
cost of such  maintenance  and  repairs.  Landlord  will not be  liable  for any
failure to make any such  repairs  or to perform  any  maintenance  unless  such
failure shall persist for an unreasonable  time after written notice of the need
of such  repairs  or  maintenance  is given to  Landlord  by  Tenant.  Except as
provided in Paragraph  20,  Tenant will not be entitled to any abatement of rent
and  Landlord  will  not  have any  liability  by  reason  of any  injury  to or
interference  with  Tenant's  business  arising  from the making of any repairs,
alterations or improvements in or to any portion of the Building or the Premises
or in or to fixtures,  appurtenances  and equipment  therein.  Tenant waives the
right to make repairs at Landlord's  expense under any law, statute,  ordinance,
rule, regulation, order or ruling (including,  without limitation, to the extent
the Premises are located in California,  the provisions of California Civil Code
Sections 1941 and 1942 and any successor  statutes or laws of a similar nature).

(b)  Tenant's  Obligations.  Tenant  agrees to keep,  maintain  and preserve the
Premises  in first  class  condition  and repair  and,  when and if  needed,  at
Tenant's  sole cost and  expense,  to make all repairs to the Premises and every
part thereof.  Any such  maintenance and repairs will be performed by Landlord's
contractor, or at Landlord's option, by such contractor or contractors as Tenant
may choose from an approved  list to be submitted by Landlord.  Tenant agrees to
pay all costs and expenses  incurred in such maintenance and repair within seven
(7) days after  billing by Landlord or such  contractor or  contractors.  Tenant
agrees to cause any mechanics'  liens or other liens arising as a result of work
performed  by Tenant or at Tenant's  direction to be  eliminated  as provided in
Paragraph 15 below. Except as provided in subparagraph 14(a) above, Landlord has
no obligation to alter, remodel, improve, repair, decorate or paint the Premises
or any part  thereof.

(c)  Tenant's  Failure to Repair.  If Tenant  refuses or  neglects to repair and
maintain  the  Premises  properly  as  required   hereunder  to  the  reasonable
satisfaction of Landlord,  Landlord, at any time following thirty (30) days from
the date on which  Landlord  makes a written  demand  on  Tenant to effect  such
repair and maintenance, may enter upon the Premises and make such repairs and/or
maintenance,  and upon completion  thereof,  Tenant agrees to pay to Landlord as
additional rent,  Landlord's costs for making such repairs plus an amount not to
exceed ten percent (10%) of such costs for overhead,  within thirty (30) days of
receipt  from  Landlord of a written  itemized  bill  therefor.  Any amounts not
reimbursed  by Tenant  within such thirty (30) day period will bear  interest at
the Interest Rate until paid by Tenant.

                                      -12-
<PAGE> 33

(d) Landlord Repairs/Default. Notwithstanding anything to the contrary contained
in Paragraph 14(a) regarding repairs or Landlord's  default,  if Tenant provides
written notice to Landlord of an event or circumstance  relative to the Premises
which requires the action of Landlord with respect to repair and/or maintenance,
and Landlord  fails to provide such action  within a reasonable  period of time,
given the  circumstances,  after the receipt of such written  notice,  but in no
event earlier than thirty (30) days after receipt of such written notice, unless
Landlord is specifically  required to act in less than thirty (30) days pursuant
to a  specific  provision  of this  Lease  or  because  of an  emergency  by any
provision  hereof,  then  Tenant may  proceed to take the  required  action upon
delivery of an additional written notice to Landlord specifying Tenant is taking
such required action, including the date of such action to be taken, the cost of
such action, and the projected  completion date, and if such action was required
under the terms of this  Lease to be taken by  Landlord,  then  Tenant  shall be
entitled to prompt  reimbursement  by Landlord of Tenant's  reasonable,  actual,
documented costs and expenses in taking such action plus interest thereon at the
Interest  Rate.  In the event  Tenant  takes such  action,  and such work in the
Premises will affect the Building's life safety system, heating, ventilating and
air conditioning  systems and elevator systems,  or the structural  integrity of
the Building,  Tenant shall use only those  contractors  used by Landlord in the
Building  for work on such  systems or other  contractors  approved by Landlord.
Further,  if Landlord  does not deliver a detailed  written  objection to Tenant
within  thirty  (30) days after  receipt of an invoice by Tenant of its costs of
taking  action which Tenant  claims  should have been taken by Landlord,  and if
such invoice from Tenant sets forth a reasonably particularized breakdown of its
costs and expenses in connection  with taking such action on behalf of Landlord,
then Tenant shall be entitled to deduct from rental payable by Tenant under this
Lease, the amount set forth in such invoice.  If, however,  Landlord delivers to
Tenant  within  thirty (30) days after  receipt of Tenant's  invoice,  a written
objection  to the  payment  of  such  invoice,  setting  forth  with  reasonable
particularity  Landlord's reasons for its claim that such action did not have to
be taken by Landlord  pursuant to the terms of this Lease, then Tenant shall not
be entitled to such deduction from rental,  but as Tenant's sole remedy,  Tenant
may proceed to claim a default by Landlord or, if elected by either  Landlord or
Tenant, the matter shall proceed to resolution by the selection of an arbitrator
to resolve  the  dispute,  which  arbitrator  shall be  selected  and  qualified
pursuant to the rules of the American Arbitration  Association,  and whose costs
shall be paid for by the  losing  party,  unless it is not clear that there is a
"losing party," in which event the costs of arbitration shall be shared equally.
Judgment on the award rendered by the  arbitrator(s) may be entered in any court
having jurisdiction thereof.

15. LIENS.  Tenant agrees not to permit any mechanic's,  materialmen's  or other
liens to be filed  against all or any part of the  Development,  the Building or
the Premises, nor against Tenant's leasehold interest in the Premises, by reason
of or in connection  with any repairs,  alterations,  improvements or other work
contracted for or undertaken by Tenant or any other act or omission of Tenant or
Tenant's agents,  employees,  contractors,  licensees or invitees. At Landlord's
request,  Tenant agrees to provide  Landlord with  enforceable,  conditional and
final lien  releases  (or other  evidence  reasonably  requested  by Landlord to
demonstrate  protection  from liens) from all persons  furnishing  labor  and/or
materials at the Premises.  Landlord will have the right at all reasonable times
to post on the  Premises and record any notices of  non-responsibility  which it
deems  necessary for  protection  from such liens.  If any such liens are filed,
Tenant  will,  at its sole cost,  promptly  cause such liens to be  released  of
record  or bonded so that it no longer  affects  title to the  Development,  the
Building  or the  Premises.  If Tenant  fails to cause  any such  liens to be so
released or bonded within ten (10) days after filing thereof,  such failure will
be deemed a material  breach by Tenant  under this Lease  without the benefit of
any  additional  notice or cure period  described  in  Paragraph  22 below,  and
Landlord may, without waiving its rights and remedies based on such breach,  and
without  releasing  Tenant from any of its  obligations,  cause such liens to be
released by any means it shall deem proper, including payment in satisfaction of
the claims giving rise to such liens.  Tenant  agrees to pay to Landlord  within
ten (10) days after receipt of invoice from  Landlord,  any sum paid by Landlord
to remove such liens,  together with interest at the Interest Rate from the date
of such payment by Landlord.

16. ENTRY BY LANDLORD.  Landlord and its  employees and agents will at all times
have the right to enter the Premises to inspect the same,  to supply  janitorial
service and any other service to be provided by Landlord to Tenant hereunder, to
show the  Premises to  prospective  purchasers  or tenants,  to post  notices of
nonresponsibility,  and/or to repair the  Premises as  permitted  or required by
this Lease. In exercising such entry rights, Landlord will endeavor to minimize,
as reasonably  practicable,  the interference with Tenant's  business,  and will
provide  Tenant  with  reasonable  advance  notice of any such entry  (except in
emergency situations).  Landlord may, in order to carry out such purposes, erect
scaffolding  and other necessary  structures  where  reasonably  required by the
character  of the work to be  performed.  Landlord  will at all  times  have and
retain a key with which to unlock all doors in the Premises,  excluding Tenant's
vaults and safes.  Landlord  will have the right to use any and all means  which
Landlord may reasonably  deem proper to open said doors in an emergency in order
to obtain entry to the Premises.  Any entry to the Premises obtained by Landlord
by any of said means,  or  otherwise,  will not be  construed  or deemed to be a
forcible or unlawful entry into the Premises,  or an eviction of Tenant from the
Premises.  Landlord  will not be liable to Tenant for any  damages or losses for
any entry by Landlord.


                                      -13-
<PAGE> 34

17.  UTILITIES  AND  SERVICES.  Throughout  the Term of the Lease so long as the
Premises are  occupied,  Landlord  agrees to furnish or cause to be furnished to
the Premises the utilities and services described in the Standards for Utilities
and Services  attached  hereto as Exhibit "F",  subject to the conditions and in
accordance  with the standards set forth  therein.  Landlord may require  Tenant
from time to time to provide  Landlord with a list of Tenant's  employees and/or
agents which are  authorized  by Tenant to subscribe on behalf of Tenant for any
additional  services  which may be provided  by  Landlord.  Any such  additional
services  will be  provided  to Tenant at Tenant's  cost.  Landlord  will not be
liable to Tenant for any failure to furnish any of the  foregoing  utilities and
services if such failure is caused by all or any of the following: (i) accident,
breakage or repairs; (ii) strikes,  lockouts or other labor disturbance or labor
dispute of any character;  (iii)  governmental  regulation,  moratorium or other
governmental  action  or  inaction;  (iv)  inability  despite  the  exercise  of
reasonable  diligence  to obtain  electricity,  water or fuel;  or (v) any other
cause beyond Landlord's  reasonable  control.  In addition,  in the event of any
stoppage or interruption of services or utilities,  Tenant shall not be entitled
to any  abatement  or  reduction  of  rent  (except  as  expressly  provided  in
subparagraphs  20(f) or 21(b) if such  failure  results  from a damage or taking
described  therein),  no eviction  of Tenant  will result from such  failure and
Tenant will not be relieved from the performance of any covenant or agreement in
this Lease  because of such  failure.  In the event of any failure,  stoppage or
interruption  thereof,  Landlord agrees to diligently  attempt to resume service
promptly.  If Tenant requires or utilizes more water or electrical power than is
considered reasonable or normal by Landlord,  Landlord may at its option require
Tenant to pay, as additional  rent, the cost, as fairly  determined by Landlord,
incurred by such  extraordinary  usage  and/or  Landlord  may  install  separate
meter(s)  for  the  Premises,  at  Tenant's  sole  expense,  and  Tenant  agrees
thereafter to pay all charges of the utility providing service and Landlord will
make an appropriate  adjustment to Tenant's  Operating  Expenses  calculation to
account for the fact Tenant is directly  paying such metered  charges,  provided
Tenant  will  remain  obligated  to pay its  proportionate  share  of  Operating
Expenses  subject to such  adjustment.  Notwithstanding  the  provisions of this
Paragraph 17, if for more than three (3)  consecutive  business  days  following
written notice to Landlord,  there is no elevator service to the Premises, or no
HVAC or electricity to the Premises,  or such an interruption of other essential
utilities and building  services,  such as fire protection or water, so that any
portion  of the  Premises  cannot  be  used  by  Tenant,  in  Tenant's  judgment
reasonably  exercised,  then Tenant's rent shall  thereafter be abated until the
Premises  are  again  usable  by Tenant  in  proportion  to the  extent to which
Tenant's use of the Premises is  interfered  with;  provided,  however,  that if
Landlord is  diligently  pursuing  the repair of such  utilities or services and
Landlord provides substitute services reasonably suitable for Tenant's purposes,
as for  example,  bringing in portable  air-conditioning  equipment,  then there
shall not be any abatement of rent.  This  provision  shall not apply in case of
damage to, or  destruction  of,  the  Premises,  which  shall be  governed  by a
separate provision of this Lease.

18.   ASSUMPTION OF RISK AND INDEMNIFICATION.

(a)  Assumption  of Risk.  Tenant,  as a material part of the  consideration  to
Landlord,  hereby  agrees that neither  Landlord  nor any  Landlord  Indemnified
Parties  (as defined in  subparagraph  8(c) above) will be liable to Tenant for,
and Tenant  expressly  assumes  the risk of and waives any and all claims it may
have against Landlord or any Landlord  Indemnified  Parties with respect to, (i)
any and all  damage  to  property  or injury to  persons  in,  upon or about the
Premises,  the Building or the  Development  resulting  from any act or omission
(except for the grossly negligent or intentionally  wrongful act or omission) of
Landlord,  (ii) any such damage  caused by other  tenants or persons in or about
the  Building or the  Development,  or caused by  quasi-public  work,  (iii) any
damage to property  entrusted to employees of the Building,  (iv) any loss of or
damage to property by theft or otherwise, or (v) any injury or damage to persons
or property  resulting from any casualty,  explosion,  falling  plaster or other
masonry or glass, steam, gas, electricity, water or rain which may leak from any
part of the Building or any other portion of the  Development or from the pipes,
appliances or plumbing  works therein or from the roof,  street or subsurface or
from any other place,  or resulting from dampness.  Notwithstanding  anything to
the  contrary  contained  in this  Lease,  neither  Landlord  nor  any  Landlord
Indemnified Parties will be liable for consequential  damages arising out of any
loss of the use of the Premises or any equipment or facilities therein by Tenant
or any  Tenant  Parties  or for  interference  with  light or other  incorporeal
hereditaments.  Tenant  agrees to give prompt notice to Landlord in case of fire
or accidents in the Premises or the  Building,  or of defects  therein or in the
fixtures  or  equipment.

                                      -14-
<PAGE> 35

(b)  Indemnification.  Except to the extent that the Indemnified  Claim would be
covered by  insurance  coverage  maintained  by Landlord  and would not cause an
increase to applicable  premiums charged for Landlord's  insurance  policy(ies),
Tenant will be liable for, and agrees,  to the maximum extent  permissible under
applicable  law,  to  promptly  indemnify,  protect,  defend  and hold  harmless
Landlord and all Landlord  Indemnified  Parties,  from and against,  any and all
claims,  damages,  judgments,  suits,  causes of  action,  losses,  liabilities,
penalties,  fines, expenses and costs, including attorneys' fees and court costs
(collectively,  "Indemnified Claims"),  arising or resulting from (i) any act or
omission  of Tenant or any  Tenant  Parties  (as  defined in  subparagraph  8(c)
above);  (ii) the use of the  Premises  and Common Areas and conduct of Tenant's
business by Tenant or any Tenant Parties,  or any other activity,  work or thing
done,  permitted  or suffered by Tenant or any Tenant  Parties,  in or about the
Premises,  the Building or elsewhere  within the  Development;  and/or (iii) any
default by Tenant of any  obligations on Tenant's part to be performed under the
terms of this  Lease.  In case any  action  or  proceeding  is  brought  against
Landlord or any Landlord  Indemnified  Parties by reason of any such Indemnified
Claims, Tenant, upon notice from Landlord, agrees to promptly defend the same at
Tenant's sole cost and expense by counsel approved in writing by Landlord, which
approval Landlord will not unreasonably withhold.

(c)   Survival; No Release of Insurers.  Tenant's indemnification obligations
under subparagraph 18(b) will survive the expiration or earlier termination
of this Lease.  Tenant's covenants, agreements and indemnification obligation
in subparagraphs 18(a) and 18(b) above, are not intended to and will not
relieve any insurance carrier of its obligations under policies required to
be carried by Tenant pursuant to the provisions of this Lease.

19.   INSURANCE.

(a)  Tenant's  Insurance.  On  or  before  the  earlier  to  occur  of  (i)  the
Commencement Date, or (ii) the date Tenant commences any work of any type in the
Premises  pursuant to this Lease (which may be prior to the Commencement  Date),
and  continuing  throughout  the  entire  Term  hereof  and any other  period of
occupancy,  Tenant agrees to keep in full force and effect, at its sole cost and
expense, the following insurance:

(i) "All Risks" property insurance including at least the following perils: fire
and extended coverage, smoke damage,  vandalism,  malicious mischief,  sprinkler
leakage (including earthquake sprinkler leakage).  This insurance policy must be
upon all property owned by Tenant,  for which Tenant is legally liable, or which
is  installed  at  Tenant's  expense,  and  which  is  located  in the  Building
including,  without  limitation,  any  Tenant  Improvements  which  satisfy  the
foregoing  qualification  and  any  Alterations,  and all  furniture,  fittings,
installations,  fixtures and any other personal property of Tenant, in an amount
not less than the full  replacement  cost  thereof.  If there is a dispute as to
full  replacement  cost,  the decision of Landlord or any  mortgagee of Landlord
will be presumptive.

(ii) One (1) year  insurance  coverage  for  business  interruption  and loss of
income and extra  expense  insuring the same perils  described  in  subparagraph
19(a)(i)  above,  in such  amounts  as will  reimburse  Tenant for any direct or
indirect loss of earnings  attributable to any such perils including  prevention
of access to the Premises, Tenant's parking areas or the Building as a result of
any such perils.

(iii) Commercial General Liability Insurance or Comprehensive  General Liability
Insurance (on an occurrence  form) insuring  bodily injury,  personal injury and
property  damage  including the following  divisions and extensions of coverage:
Premises and Operations; Owners and Contractors protective;  blanket contractual
liability  (including  coverage for Tenant's  indemnity  obligations  under this
Lease);  products and completed  operations;  liquor liability (if Tenant serves
alcohol on the Premises); and fire and water damage legal liability in an amount
sufficient  to cover the  replacement  value of the Premises,  including  Tenant
Improvements, that are rented under the terms of this Lease. Such insurance must
have the following minimum limits of liability:  bodily injury,  personal injury
and property  damage - $1,000,000  each  occurrence,  provided that if liability
coverage  is  provided  by a  Commercial  General  Liability  policy the general
aggregate  limit shall apply  separately and in total to this location only (per
location  general  aggregate),  and provided  further,  such  minimum  limits of
liability may be adjusted from year to year to reflect increases in coverages as
recommended by Landlord's  insurance  carrier as being prudent and  commercially
reasonable  for  tenants  of first  class  office  buildings  comparable  to the
Building, rounded to the nearest five hundred thousand dollars.


                                      -15-
<PAGE> 36

(iv)  Comprehensive  Automobile  Liability  insuring  bodily injury and property
damage  arising  from all owned,  non-owned  and hired  vehicles,  if any,  with
minimum   limits  of  liability  of  $1,000,000   per  accident.

(v)  Worker's  Compensation  as required by the laws of the State of  California
with the following minimum limits of liability: Coverage A - statutory benefits;
Coverage B - $1,000,000 per accident and disease.

(vi)  Any  other  form or  forms of  insurance  as  Tenant  or  Landlord  or any
mortgagees  of Landlord may  reasonably  require  from time to time in form,  in
amounts,  and for insurance  risks against which, a prudent tenant would protect
itself, but only to the extent coverage for such risks and amounts are available
in the insurance  market at  commercially  acceptable  rates.  Landlord makes no
representation  that the limits of  liability  required  to be carried by Tenant
under the terms of this Lease are  adequate to protect  Tenant's  interests  and
Tenant should obtain such additional  insurance or increased liability limits as
Tenant deems appropriate.

(b) Supplemental Tenant Insurance Requirements.

(i) All  policies  must be in a form  reasonably  satisfactory  to Landlord  and
issued by an insurer  admitted to do business in the State of  California.

(ii) All policies must be issued by insurers with a  policyholder  rating of "A"
and a financial  rating of "X" in the most  recent  version of Best's Key Rating
Guide.

(iii) All policies must contain a requirement to notify Landlord (and Landlord's
property  manager and any mortgagees or ground lessors of Landlord who are named
as additional insureds,  if any) in writing not less than thirty (30) days prior
to any material change, reduction in coverage, cancellation or other termination
thereof.  Tenant  agrees to deliver to Landlord,  as soon as  practicable  after
placing the required insurance, but in any event within the time frame specified
in subparagraph  19(a) above,  certificate(s) of insurance and/or if required by
Landlord,  certified  copies of each policy  evidencing  the  existence  of such
insurance and Tenant's  compliance  with the  provisions  of this  Paragraph 19.
Tenant agrees to cause  replacement  policies or certificates to be delivered to
Landlord  not less than  thirty  (30) days prior to the  expiration  of any such
policy or policies.  If any such initial or replacement policies or certificates
are not furnished within the time(s) specified herein,  Tenant will be deemed to
be in material  default under this Lease  without the benefit of any  additional
notice or cure period provided in  subparagraph  22(a)(ii)  below,  and Landlord
will have the right,  but not the  obligation,  to  procure  such  insurance  as
Landlord deems necessary to protect Landlord's interests at Tenant's expense. If
Landlord obtains any insurance that is the  responsibility  of Tenant under this
Paragraph 19, Landlord agrees to deliver to Tenant a written  statement  setting
forth the cost of any such insurance and showing in reasonable detail the manner
in which it has been computed and Tenant agrees to promptly  reimburse  Landlord
for such costs as additional rent.

(iv) General  Liability and Automobile  Liability  policies under  subparagraphs
19(a)(iii) and 19(a)(iv) must name Landlord and Landlord's property manager (and
at Landlord's request,  Landlord's mortgagees and ground lessors of which Tenant
has been  informed in writing) as  additional  insureds  and must also contain a
provision  that the insurance  afforded by such policy is primary  insurance and
any insurance carried by Landlord and Landlord's  property manager or Landlord's
mortgagees or ground lessors,  if any, will be excess over and  non-contributing
with Tenant's  insurance. 

(c) Tenant's Use.  Tenant will not keep,  use, sell or offer for sale in or upon
the  Premises  any  article  which may be  prohibited  by any  insurance  policy
periodically in force covering the Building or the Development  Common Areas. If
Tenant's occupancy or business in, or on, the Premises,  whether or not Landlord
has consented to the same, results in any increase in premiums for the insurance
periodically carried by Landlord with respect to the Building or the Development
Common  Areas or  results  in the need  for  Landlord  to  maintain  special  or
additional  insurance,  Tenant  agrees  to pay  Landlord  the  cost of any  such
increase in premiums or special or additional coverage as additional rent within
ten (10) days after being billed  therefor by Landlord.  In determining  whether
increased  premiums  are a result of Tenant's  use of the  Premises,  a schedule
issued by the  organization  computing the insurance  rate on the Building,  the
Development  Common  Areas  or  the  Tenant  Improvements  showing  the  various
components of such rate,  will be  conclusive  evidence of the several items and
charges  which make up such rate.  Tenant  agrees to  promptly  comply  with all
reasonable  requirements  of the  insurance  authority  or any present or future
insurer relating to the Premises.

                                      -16-
<PAGE> 37

(d) Cancellation of Landlord's Policies. If any of Landlord's insurance policies
are  cancelled  or  cancellation  is  threatened  or  the  coverage  reduced  or
threatened  to be reduced in any way  because of the use of the  Premises or any
part  thereof  by Tenant or any  assignee  or  subtenant  of Tenant or by anyone
Tenant  permits on the  Premises  and, if Tenant  fails to remedy the  condition
giving  rise  to  such  cancellation,   threatened  cancellation,  reduction  of
coverage,  threatened reduction of coverage, increase in premiums, or threatened
increase in premiums, within forty-eight (48) hours after notice thereof, Tenant
will be deemed to be in material  default of this Lease and Landlord may, at its
option,  either  terminate  this Lease or enter upon the Premises and attempt to
remedy such  condition,  and Tenant shall  promptly pay Landlord the  reasonable
costs of such remedy as additional rent. If Landlord is unable, or elects not to
remedy such condition,  then Landlord will have all of the remedies provided for
in this Lease in the event of a default by Tenant.

(e) Waiver of Subrogation.  Tenant's  property  insurance shall contain a clause
whereby the insurer waives all rights of recovery by way of subrogation  against
Landlord.  Tenant  shall also  obtain and  furnish  evidence  to Landlord of the
waiver by  Tenant's  worker's  compensation  insurance  carrier of all rights of
recovery by way of subrogation against Landlord.


20.   DAMAGE OR DESTRUCTION.

(a) Partial Destruction.  If the Premises or the Building are damaged by fire or
other casualty to an extent not exceeding  twenty-five percent (25%) of the full
replacement cost thereof,  and Landlord's  contractor  reasonably estimates in a
writing  delivered  to  Landlord  and  Tenant  that the  damage  thereto  may be
repaired,  reconstructed or restored to substantially its condition  immediately
prior to such damage within one hundred  eighty (180) days from the date of such
casualty,  and Landlord will receive insurance proceeds  sufficient to cover the
costs of such repairs,  reconstruction and restoration  (including proceeds from
Tenant and/or Tenant's insurance which Tenant is required to deliver to Landlord
pursuant to subparagraph 20(e) below to cover Tenant's  obligation for the costs
of  repair,  reconstruction  and  restoration  of  any  portion  of  the  Tenant
Improvements  and any  Alterations  for which Tenant is  responsible  under this
Lease), then Landlord agrees to commence and proceed diligently with the work of
repair,  reconstruction  and  restoration  and this Lease will  continue in full
force and effect.

(b)  Substantial  Destruction.  Any damage or destruction to the Premises or the
Building  which  Landlord is not  obligated to repair  pursuant to  subparagraph
20(a)  above  will be  deemed  a  substantial  destruction.  In the  event  of a
substantial  destruction,  Landlord may elect to either (i) repair,  reconstruct
and  restore  the  portion  of the  Building  or the  Premises  damaged  by such
casualty,  in which  case this  Lease will  continue  in full force and  effect,
subject to Tenant's  termination right contained in subparagraph 20(d) below; or
(ii)  terminate  this Lease  effective  as of the date which is thirty (30) days
after Tenant's receipt of Landlord's election to so terminate.

(c) Notice.  Under any of the conditions of subparagraphs  20(a) or 20(b) above,
Landlord  agrees to give written  notice to Tenant of its intention to repair or
terminate,  as permitted in such  paragraphs,  within the earlier of thirty (30)
days  after  the  occurrence  of such  casualty,  or  fifteen  (15)  days  after
Landlord's  receipt of the estimate from  Landlord's  contractor (the applicable
time period to be referred to herein as the "Notice Period").

(d) Tenant's  Termination Rights. If Landlord elects to repair,  reconstruct and
restore  pursuant  to  subparagraph  20(b)(i)  hereinabove,  and  if  Landlord's
contractor  estimates  that as a result of such damage,  Tenant  cannot be given
reasonable  use of and access to the Premises  within two hundred  seventy (270)
days  after the date of such  damage,  then  Tenant  may  terminate  this  Lease
effective upon delivery of written notice to Landlord within ten (10) days after
Landlord delivers notice to Tenant of its election to so repair,  reconstruct or
restore.

                                      -17-
<PAGE> 38

(e)  Tenant's  Costs  and  Insurance  Proceeds.  In the  event of any  damage or
destruction of all or any part of the Premises, Tenant agrees to immediately (i)
notify  Landlord  thereof,  and (ii) deliver to Landlord all property  insurance
proceeds received by Tenant with respect to any Tenant Improvements installed by
or at the  cost of  Tenant  and any  Alterations,  but  excluding  proceeds  for
Tenant's furniture,  fixtures, equipment and other personal property, whether or
not this Lease is  terminated  as  permitted  in this  Paragraph  20, and Tenant
hereby  assigns to Landlord all rights to receive such insurance  proceeds.  If,
for any reason  (including  Tenant's  failure to obtain  insurance  for the full
replacement  cost of any  Tenant  Improvements  installed  by or at the  cost of
Tenant and any Alterations from any and all casualties), Tenant fails to receive
insurance proceeds covering the full replacement cost of any Tenant Improvements
installed  by or at the cost of Tenant and any  Alterations  which are  damaged,
Tenant will be deemed to have  self-insured  the replacement cost of such items,
and upon any damage or destruction thereto,  Tenant agrees to immediately pay to
Landlord the full  replacement cost of such items,  less any insurance  proceeds
actually received by Landlord from Landlord's or Tenant's insurance with respect
to such  items. 

(f) Abatement of Rent. In the event of any damage, repair, reconstruction and/or
restoration  described in this Paragraph 20, rent will be abated or reduced,  as
the case may be, from the date of such casualty,  in proportion to the degree to
which  Tenant's  use of the  Premises is  impaired  during such period of repair
until  such  use  is  restored.   Except  for  abatement  of  rent  as  provided
hereinabove, Tenant will not be entitled to any compensation or damages for loss
of, or interference with,  Tenant's business or use or access of all or any part
of the  Premises or for lost profits or any other  consequential  damages of any
kind or nature,  which result from any such damage,  repair,  reconstruction  or
restoration.

(g) Inability to Complete. Notwithstanding anything to the contrary contained in
this  Paragraph  20, if Landlord is obligated  or elects to repair,  reconstruct
and/or restore the damaged  portion of the Building or the Premises  pursuant to
subparagraphs  20(a) or 20(b)(i)  above,  but is delayed  from  completing  such
repair,  reconstruction  and/or  restoration beyond the date which is sixty (60)
days after the date estimated by Landlord's contractor for completion thereof by
reason of any  causes  (other  than  delays  caused by Tenant,  its  subtenants,
employees,  agents or  contractors  or delays  which are beyond  the  reasonable
control of Landlord as  described in Paragraph 33 which delays in no event shall
exceed a total of ninety (90) days), then either Landlord or Tenant may elect to
terminate  this Lease upon ten (10) days prior written notice given to the other
after the expiration of such sixty (60) day period.

(h) Damage Near End of Term.  Landlord  and Tenant  shall each have the right to
terminate this Lease if any damage to the Premises occurs during the last twelve
(12) months of the Term of this Lease where Landlord's contractor estimates in a
writing  delivered  to Landlord  and Tenant that the repair,  reconstruction  or
restoration of such damage cannot be completed  within sixty (60) days after the
date of such  casualty.  If either party  desires to terminate  this Lease under
this  subparagraph  20(h), it shall provide written notice to the other party of
such  election  within ten (10) days after  receipt of  Landlord's  contractor's
repair estimates.

(i) Waiver of  Termination  Right.  Landlord and Tenant agree that the foregoing
provisions  of this  Paragraph  20 are to govern  their  respective  rights  and
obligations in the event of any damage or  destruction  and supersede and are in
lieu  of the  provisions  of  any  applicable  law,  statute,  ordinance,  rule,
regulation, order or ruling now or hereafter in force which provide remedies for
damage or destruction of leased premises (including,  without limitation, to the
extent the Premises are located in  California,  the  provisions  of  California
Civil Code Section 1932,  Subsection  2, and Section 1933,  Subsection 4 and any
successor statute or laws of a similar nature).

(j) Termination.  Upon any termination of this Lease under any of the provisions
of this Paragraph 20, the parties will be released without further obligation to
the other from the date  possession of the Premises is  surrendered  to Landlord
except for items which have accrued and are unpaid as of the date of termination
and matters  which are to survive any  termination  of this Lease as provided in
this Lease.

21.   EMINENT DOMAIN.

(a) Substantial  Taking.  If the whole of the Premises,  or such part thereof as
shall  substantially  interfere with Tenant's use and occupancy of the Premises,
as contemplated  by this Lease, is taken for any public or quasi-public  purpose
by any lawful  power or  authority  by exercise  of the right of  appropriation,
condemnation  or eminent  domain,  or sold to prevent such taking,  either party
will have the right to terminate this Lease  effective as of the date possession
is  required  to be  surrendered  to  such  authority.  Further,  if  more  than
twenty-five  percent (25%) of the parking facilities  servicing the Building are
taken for public or  quasi-public  purposes by any lawful  power or authority by
exercise of the right of  appropriation,  condemnation  or eminent  domain,  and
Landlord does not provide reasonable  substitute parking within ninety (90) days
of such  appropriation,  Tenant  shall  have the right to  terminate  this Lease
effective as of the expiration of such ninety (90) day period.


                                      -18-
<PAGE> 39

(b) Partial Taking;  Abatement of Rent. In the event of a taking of a portion of
the  Premises  which does not  substantially  interfere  with  Tenant's  use and
occupancy of the Premises,  then, neither party will have the right to terminate
this Lease and Landlord will thereafter proceed to make a functional unit of the
remaining  portion of the  Premises  (but only to the extent  Landlord  receives
proceeds therefor from the condemning  authority),  and rent will be abated with
respect to the part of the  Premises  which  Tenant is deprived of on account of
such taking. Notwithstanding the immediately preceding sentence to the contrary,
if any part of the  Building or the  Development  is taken  (whether or not such
taking substantially interferes with Tenant's use of the Premises), Landlord may
terminate  this Lease upon  thirty (30) days prior  written  notice to Tenant if
Landlord also  terminates  the leases of the other tenants of the Building which
are leasing comparably sized space for comparable lease terms.

(c)  Condemnation  Award.  In connection  with any taking of the Premises or the
Building,  Landlord  will be entitled to receive the entire  amount of any award
which may be made or given in such taking or condemnation,  without deduction or
apportionment  for  any  estate  or  interest  of  Tenant,  it  being  expressly
understood  and  agreed by Tenant  that no  portion  of any such  award  will be
allowed or paid to Tenant for any so-called bonus or excess value of this Lease,
and such bonus or excess  value will be the sole  property of  Landlord.  Tenant
agrees not to assert any claim against  Landlord or the taking authority for any
compensation  because of such  taking  (including  any claim for bonus or excess
value of this  Lease);  provided,  however,  if any  portion of the  Premises is
taken, Tenant will have the right to recover from the condemning  authority (but
not from Landlord) any compensation as may be separately  awarded or recoverable
by Tenant for the taking of Tenant's  furniture,  fixtures,  equipment and other
personal property within the Premises, for Tenant's relocation expenses, and for
any loss of  goodwill  or other  damage to  Tenant's  business by reason of such
taking. 

(d) Temporary Taking. In the event of taking of the Premises or any part thereof
for temporary use, (i) this Lease will remain  unaffected  thereby and rent will
abate for the duration of the taking in proportion to the extent Tenant's use of
the Premises is interfered  with,  and (ii) Landlord will be entitled to receive
such  portion or portions of any award made for such use  provided  that if such
taking remains in force at the expiration or earlier  termination of this Lease,
Tenant  will  then  pay to  Landlord  a sum  equal  to the  reasonable  cost  of
performing Tenant's  obligations under Paragraph 11 with respect to surrender of
the Premises and upon such payment Tenant will be excused from such obligations.
For purpose of this subparagraph 21(d), a temporary taking shall be defined as a
taking for a period of ninety (90) days or less.

22.   DEFAULTS AND REMEDIES.

(a) Defaults.  The occurrence of any one or more of the following events will be
deemed a default by  Tenant:

(i) The failure by Tenant to make any payment of rent or additional  rent or any
other payment  required to be made by Tenant  hereunder,  as and when due, where
such  failure  continues  for a period of ten (10)  days  after  written  notice
thereof from Landlord to Tenant; provided, however, that any such notice will be
in lieu of, and not in addition to, any notice  required  under  applicable  law
(including,  without  limitation,  to the extent  the  Premises  are  located in
California,  the provisions of California Code of Civil  Procedure  Section 1161
regarding unlawful detainer actions or any successor statute or law of a similar
nature).

(ii) The  failure by Tenant to observe or perform  any of the express or implied
covenants  or  provisions  of this Lease to be observed or  performed by Tenant,
other than as specified in  subparagraph  22(a)(i) or above,  where such failure
continues (where no other period of time is expressly  provided) for a period of
thirty (30) days after  written  notice  thereof  from  Landlord to Tenant.  The
provisions  of any such notice  will be in lieu of, and not in addition  to, any
notice required under  applicable law  (including,  without  limitation,  to the
extent  the  Premises  are  located  in  California,  California  Code of  Civil
Procedure  Section 1161 regarding  unlawful  detainer  actions and any successor
statute or similar  law).  If the nature of  Tenant's  default is such that more
than ten (10) days are reasonably required for its cure, then Tenant will not be
deemed to be in default if Tenant, with Landlord's  concurrence,  commences such
cure within such ten (10) day period and thereafter  diligently  prosecutes such
cure to completion.


                                      -19-
<PAGE> 40


(iii) (A) The  making by Tenant of any  general  assignment  for the  benefit of
creditors;  (B) the filing by or against  Tenant of a  petition  to have  Tenant
adjudged a bankrupt or a petition for  reorganization  or arrangement  under any
law relating to  bankruptcy  (unless,  in the case of a petition  filed  against
Tenant,  the same is dismissed within sixty (60) days); (C) the appointment of a
trustee or receiver to take possession of  substantially  all of Tenant's assets
located at the Premises or of Tenant's interest in this Lease,  where possession
is not  restored  to Tenant  within  thirty  (30) days;  or (D) the  attachment,
execution or other  judicial  seizure of  substantially  all of Tenant's  assets
located at the Premises or of Tenant's interest in this Lease where such seizure
is not discharged within thirty (30) days.

(b) Landlord's Remedies;  Termination. In the event of any default by Tenant, in
addition to any other  remedies  available to Landlord at law or in equity under
applicable law (including,  without  limitation,  to the extent the Premises are
located  in  California,  the  remedies  of Civil  Code  Section  1951.4 and any
successor  statute or similar law),  Landlord will have the immediate  right and
option to terminate this Lease and all rights of Tenant  hereunder.  If Landlord
elects to terminate this Lease then, to the extent  permitted  under  applicable
law,  Landlord may recover from Tenant (i) The worth at the time of award of any
unpaid rent which had been earned at the time of such termination; plus (ii) the
worth at the time of award of the  amount by which the unpaid  rent which  would
have been earned after termination until the time of award exceeds the amount of
such rent loss that Tenant proves could have been reasonably avoided; plus (iii)
the worth at the time of award of the  amount by which the  unpaid  rent for the
balance of the Term after the time of award exceeds the amount of such rent loss
that Tenant  proves  could be  reasonably  avoided;  plus (iv) any other  amount
necessary to  compensate  Landlord for all the detriment  proximately  caused by
Tenant's  failure to perform its  obligations  under this Lease or which, in the
ordinary  course of things,  results  therefrom  including,  but not limited to:
attorneys' fees and costs;  brokers'  commissions;  the costs of  refurbishment,
alterations,  renovation and repair of the Premises,  and removal (including the
repair of any damage  caused by such  removal)  and  storage  (or  disposal)  of
Tenant's  personal  property,  equipment,  fixtures,   Alterations,  the  Tenant
Improvements  and any other items which  Tenant is required  under this Lease to
remove but does not remove, as well as the unamortized value of any reduced rent
(amortized over the Original Term, with interest  thereon at the Interest Rate),
reduced  rent,  free  parking,  reduced  rate parking or other costs or economic
concessions  provided,  paid,  granted or incurred by Landlord  pursuant to this
Lease. The unamortized  value of such concessions  shall be determined by taking
the total value of such  concessions and  multiplying  such value by a fraction,
the numerator of which is the number of months of the Lease Term not yet elapsed
as of the date on which the Lease is terminated, and the denominator of which is
the total number of months of the Lease Term. As used in subparagraphs  22(b)(i)
and  22(b)(ii)  above,  the "worth at the time of award" is computed by allowing
interest at the Interest Rate. As used in  subparagraph  22(b)(iii)  above,  the
"worth at the time of award"  is  computed  by  discounting  such  amount at the
discount rate of the Federal  Reserve Bank of San Francisco at the time of award
plus one percent (1%).

(c) Landlord's Remedies; Re-Entry Rights. In the event of any default by Tenant,
in addition to any other remedies available to Landlord under this Lease, at law
or in equity,  Landlord  will also have the right,  with or without  terminating
this Lease,  to re-enter the  Premises and remove all persons and property  from
the Premises;  such property may be removed and stored in a public  warehouse or
elsewhere and/or disposed of at the sole cost and expense of and for the account
of Tenant in accordance with the provisions of subparagraph  13(h) of this Lease
or any other  procedures  permitted  by  applicable  law.  No re-entry or taking
possession of the Premises by Landlord pursuant to this subparagraph  22(c) will
be construed as an election to terminate  this Lease unless a written  notice of
such intention is given to Tenant or unless the  termination  thereof is decreed
by a court of competent jurisdiction.

                                      -20-
<PAGE> 41

(d) Landlord's Remedies; Re-Letting. In the event of the vacation or abandonment
of the Premises by Tenant or in the event that  Landlord  elects to re-enter the
Premises or takes  possession  of the Premises  pursuant to legal  proceeding or
pursuant  to any notice  provided  by law,  then if  Landlord  does not elect to
terminate this Lease,  Landlord may from time to time, without  terminating this
Lease,  either  recover all rent as it becomes due or relet the  Premises or any
part  thereof  on terms and  conditions  as  Landlord  in its sole and  absolute
discretion may deem advisable with the right to make  alterations and repairs to
the Premises in connection with such reletting.  If Landlord elects to relet the
Premises,  then rents  received by Landlord from such reletting will be applied:
first,  to the payment of any  indebtedness  other than rent due hereunder  from
Tenant to Landlord; second, to the payment of any cost of such reletting; third,
to the  payment  of the cost of any  alterations  and  repairs  to the  Premises
incurred in connection with such reletting;  fourth,  to the payment of rent due
and unpaid  hereunder  and the  residue,  if any,  will be held by Landlord  and
applied  to  payment  of  future  rent as the same may  become  due and  payable
hereunder. Should that portion of such rents received from such reletting during
any month,  which is applied to the payment of rent hereunder,  be less than the
rent payable  during that month by Tenant  hereunder,  then Tenant agrees to pay
such deficiency to Landlord  immediately upon demand therefor by Landlord.  Such
deficiency will be calculated and paid monthly.

(e) Landlord's Remedies; Performance for Tenant. All covenants and agreements to
be  performed by Tenant under any of the terms of this Lease are to be performed
by Tenant at Tenant's  sole cost and expense and without any  abatement of rent.
If Tenant  fails to pay any sum of money owed to any party other than  Landlord,
for which it is liable under this Lease, or if Tenant fails to perform any other
act on its part to be performed  hereunder,  and such failure  continues for ten
(10) days after notice  thereof by Landlord,  Landlord may,  without  waiving or
releasing Tenant from its  obligations,  but shall not be obligated to, make any
such  payment or perform any such other act to be made or  performed  by Tenant.
Tenant agrees to reimburse Landlord upon demand for all sums so paid by Landlord
and all  necessary  incidental  costs,  together  with  interest  thereon at the
Interest  Rate,  from the date of such payment by Landlord  until  reimbursed by
Tenant.  This  remedy  shall be in  addition  to any  other  right or  remedy of
Landlord set forth in this Paragraph 22.

(f) Late Payment.  If Tenant fails to pay any  installment  of rent within seven
(7) days of when due or if  Tenant  fails to make any  other  payment  for which
Tenant is obligated  under this Lease  within  seven (7) days of when due,  such
late amount will accrue  interest at the Interest  Rate and Tenant agrees to pay
Landlord  as  additional  rent such  interest  on such amount from the date such
amount becomes due until such amount is paid. In addition,  Tenant agrees to pay
to Landlord  concurrently  with such late payment amount,  as additional rent, a
late charge equal to three percent (3%) of the amount due to compensate Landlord
for the extra  costs  Landlord  will  incur as a result  of such  late  payment.
Notwithstanding  the foregoing,  Landlord hereby agrees to waive the late charge
applicable  to the  first  instance  in which  Tenant  fails to  timely  pay any
installment  of rent or other  payment for which Tenant is obligated  under this
Lease during any twelve (12) month  period.  The parties agree that (i) it would
be impractical  and extremely  difficult to fix the actual damage  Landlord will
suffer in the event of Tenant's late payment, (ii) such interest and late charge
represents a fair and  reasonable  estimate of the detriment  that Landlord will
suffer by reason of late  payment by Tenant,  and (iii) the  payment of interest
and late charges are distinct and separate in that the payment of interest is to
compensate Landlord for the use of Landlord's money by Tenant, while the payment
of  late  charges  is  to  compensate   Landlord  for   Landlord's   processing,
administrative  and other  costs  incurred  by  Landlord as a result of Tenant's
delinquent  payments.  Acceptance  of any such interest and late charge will not
constitute a waiver of the Tenant's  default with respect to the overdue amount,
or  prevent  Landlord  from  exercising  any of the other  rights  and  remedies
available to Landlord.  If Tenant incurs a late charge more than three (3) times
in any period of twelve (12) months during the Lease Term, then, notwithstanding
that Tenant  cures the late  payments  for which such late  charges are imposed,
Landlord  will  have  the  right  to  require  Tenant   thereafter  to  pay  all
installments of Monthly Base Rent quarterly in advance  throughout the remainder
of the Lease Term.


(g) Landlord's  Security  Interest.  Tenant hereby grants to Landlord a lien and
security  interest on all property of Tenant now or hereafter  placed in or upon
the Premises including, but not limited to, all fixtures, machinery,  equipment,
furnishings  and other  articles of personal  property,  and all proceeds of the
sale or other disposition of such property  (collectively,  the "Collateral") to
secure the payment of all rent to be paid by Tenant pursuant to this Lease. Such
lien and security  interest shall be in addition to any landlord's lien provided
by law. This Lease shall  constitute a security  agreement  under the Commercial
Code of the  State so that  Landlord  shall  have  and may  enforce  a  security
interest in the Collateral.  Tenant agrees to execute as debtor and deliver such
financing  statement or statements and any further documents as Landlord may now
or hereafter  reasonably  request to protect such security  interest pursuant to
such  code.  Landlord  may  also at any  time  file a copy of  this  Lease  as a
financing statement. Landlord, as secured party, shall be entitled to all rights
and  remedies  afforded  as secured  party  under such  code,  which  rights and
remedies shall be in addition to Landlord's  liens and rights provided by law or
by the other terms and provisions of this Lease.


                                      -21-
<PAGE> 42


(h) Rights and Remedies Cumulative. All rights, options and remedies of Landlord
contained in this Lease will be construed and held to be cumulative,  and no one
of them will be  exclusive of the other,  and  Landlord  shall have the right to
pursue any one or all of such  remedies or any other  remedy or relief which may
be provided by law or in equity, whether or not stated in this Lease. Nothing in
this  Paragraph  22 will  be  deemed  to  limit  or  otherwise  affect  Tenant's
indemnification of Landlord pursuant to any provision of this Lease.

23.  LANDLORD'S  DEFAULT.  Landlord will not be in default in the performance of
any  obligation  required to be  performed  by Landlord  under this Lease unless
Landlord  fails to perform  such  obligation  within  thirty (30) days after the
receipt of written notice from Tenant specifying in detail Landlord's failure to
perform;  provided however,  that if the nature of Landlord's obligation is such
that more than thirty (30) days are required for performance, then Landlord will
not be deemed in default if it  commences  such  performance  within such thirty
(30) day period and thereafter  diligently pursues the same to completion.  Upon
any default by Landlord,  Tenant may exercise any of its rights  provided at law
or in equity,  subject to the limitations on liability set forth in Paragraph 35
of this Lease.

24.   ASSIGNMENT AND SUBLETTING.

(a) Restriction on Transfer.  Except as expressly provided in this Paragraph 24,
Tenant will not,  either  voluntarily or by operation of law, assign or encumber
this Lease or any interest herein or sublet the Premises or any part thereof, or
permit the use or  occupancy of the Premises by any party other than Tenant (any
such assignment, encumbrance, sublease or the like will sometimes be referred to
as a "Transfer"),  without the prior written consent of Landlord,  which consent
Landlord will not unreasonably withhold.

(b) Corporate and Partnership  Transfers.  For purposes of this Paragraph 24, if
Tenant is a corporation,  partnership or other entity, any transfer, assignment,
encumbrance or hypothecation of twenty-five  percent (25%) or more (individually
or in the  aggregate) of any stock or other  ownership  interest in such entity,
and/or any transfer, assignment, hypothecation or encumbrance of any controlling
ownership or voting interest in such entity,  will be deemed a Transfer and will
be subject to all of the restrictions and provisions contained in this Paragraph
24.  Notwithstanding the foregoing,  the immediately preceding sentence will not
apply  to any  transfers  of  stock  of  Tenant  if  Tenant  is a  publicly-held
corporation  and such stock is transferred  publicly over a recognized  security
exchange or over-the-counter market.

(c)  Permitted  Controlled  Transfers.  Notwithstanding  the  provisions of this
Paragraph  24 to the  contrary,  Tenant  may  assign  this  Lease or sublet  the
Premises or any  portion  thereof  ("Permitted  Transfer"),  without  Landlord's
consent and without extending any sublease  termination  option to Landlord,  to
any parent, subsidiary or affiliate corporation which controls, is controlled by
or is under common control with Tenant,  or to any corporation  resulting from a
merger or consolidation  with Tenant,  or to any person or entity which acquires
all the assets of Tenant's  business as a going  concern,  provided that: (i) at
least twenty (20) days prior to such assignment or sublease,  Tenant delivers to
Landlord the financial statements and other financial and background information
of the assignee or sublessee  described in subparagraph  24(d) below; (ii) if an
assignment,  the assignee assumes, in full, the obligations of Tenant under this
Lease (or if a  sublease,  the  sublessee  of a portion of the  Premises or Term
assumes, in full, the obligations of Tenant with respect to such portion); (iii)
the  financial  net worth of the  assignee  or  sublessee  as of the time of the
proposed  assignment or sublease equals or exceeds that of Tenant as of the date
of execution of this Lease;  (iv) Tenant  remains fully liable under this Lease;
and (v)  the use of the  Premises  under  Paragraph  8  remains  unchanged.

(d)  Transfer  Notice.  If Tenant  desires to effect a  Transfer,  then at least
thirty  (30) days  prior to the date when  Tenant  desires  the  Transfer  to be
effective  (the "Transfer  Date"),  Tenant agrees to give Landlord a notice (the
"Transfer  Notice"),  stating  the name,  address and  business of the  proposed
assignee,  sublessee or other transferee  (sometimes  referred to hereinafter as
"Transferee"),  reasonable  information  (including  references)  concerning the
character,  ownership,  and financial condition of the proposed Transferee,  the
Transfer Date, any ownership or commercial  relationship  between Tenant and the
proposed  Transferee,  and the  consideration  and all other  material terms and
conditions  of the  proposed  Transfer,  all in  such  detail  as  Landlord  may
reasonably  require.  If Landlord  reasonably  requests  additional  detail, the
Transfer Notice will not be deemed to have been received until Landlord receives
such additional  detail, and Landlord may withhold consent to any Transfer until
such information is provided to it.


                                      -22-
<PAGE> 43

(e) Landlord's  Options.  Within fifteen (15) days of Landlord's  receipt of any
Transfer Notice, and any additional information requested by Landlord concerning
the proposed Transferee's  financial  responsibility,  Landlord will elect to do
one of the  following  (i) consent to the  proposed  Transfer;  (ii) refuse such
consent,  which  refusal  shall  be on  reasonable  grounds  including,  without
limitation, those set forth in subparagraph 24(f) below; or (iii) terminate this
Lease in the event of a proposed  assignment of this Lease or a subletting as to
the  entire  Premises  for  substantially  all of  the  remaining  Term,  and to
recapture the Premises for reletting by Landlord. 

(f)  Reasonable  Disapproval.   Landlord  and  Tenant  hereby  acknowledge  that
Landlord's  disapproval of any proposed Transfer pursuant to subparagraph  24(e)
will be  deemed  reasonably  withheld  if  based  upon  any  reasonable  factor,
including,  without limitation,  any or all of the following factors: (i) if the
Building is less than seventy percent (70%) occupied,  if the net effective rent
payable by the  Transferee  (adjusted  on a rentable  square foot basis) is less
than the net effective  rent then being quoted by Landlord for new leases in the
Building for  comparable  size space for a comparable  period of time;  (ii) the
proposed Transferee is a governmental  entity; (iii) the portion of the Premises
to be sublet or assigned is irregular in shape with inadequate  means of ingress
and egress;  (iv) the use of the Premises by the Transferee (A) is not permitted
by the use  provisions  in Paragraph 8 hereof,  (B) violates any  exclusive  use
granted by Landlord to another tenant in the Building,  or (C) otherwise poses a
risk of increased liability to Landlord; (v) the Transfer would likely result in
a  significant  and  inappropriate  increase in the use of the parking  areas or
Development  Common Areas by the  Transferee's  employees  or  visitors,  and/or
significantly  increase the demand upon utilities and services to be provided by
Landlord  to the  Premises;  (vi) the  Transferee  does  not have the  financial
capability  to fulfill the  obligations  imposed by the Transfer and this Lease;
(vii) the Transferee is not in Landlord's  reasonable  opinion  consistent  with
Landlord's  desired  tenant  mix; or (viii) the  Transferee  poses a business or
other economic risk which Landlord deems unacceptable.

(g) Additional Conditions.  A condition to Landlord's consent to any Transfer of
this Lease will be the delivery to Landlord of a true copy of the fully executed
instrument of assignment, sublease, transfer or hypothecation,  and, in the case
of an  assignment,  the  delivery to Landlord  of an  agreement  executed by the
Transferee in form and substance  reasonably  satisfactory to Landlord,  whereby
the Transferee assumes and agrees to be bound by all of the terms and provisions
of this Lease and to perform all of the  obligations of Tenant  hereunder.  As a
condition for granting its consent to any  assignment or sublease,  Landlord may
require that the assignee or sublessee  remit  directly to Landlord on a monthly
basis, all monies due to Tenant by said assignee or sublessee. As a condition to
Landlord's  consent to any  sublease,  such  sublease  must  provide  that it is
subject and  subordinate to this Lease and to all  mortgages;  that Landlord may
enforce the provisions of the sublease,  including  collection of rent;  that in
the  event of  termination  of this  Lease  for any  reason,  including  without
limitation a voluntary  surrender  by Tenant,  or in the event of any reentry or
repossession  of the Premises by Landlord,  Landlord may, at its option,  either
(i)  terminate  the  sublease,  or (ii)  take over all of the  right,  title and
interest  of  Tenant,  as  sublessor,  under such  sublease,  in which case such
sublessee will attorn to Landlord,  but that nevertheless  Landlord will not (1)
be liable for any previous act or omission of Tenant under such sublease, (2) be
subject to any defense or offset  previously  accrued in favor of the  sublessee
against  Tenant,  or (3) be bound by any previous  modification  of any sublease
made  without  Landlord's  written  consent,  or by any previous  prepayment  by
sublessee of more than one month's rent.

(h) Excess Rent. If Landlord  consents to any  assignment of this Lease,  Tenant
agrees to pay to Landlord,  as additional  rent, fifty percent (50%) of all sums
and other consideration payable to and for the benefit of Tenant by the assignee
on account of the assignment,  as and when such sums and other consideration are
due and payable by the assignee to or for the benefit of Tenant (or, if Landlord
so requires,  and without any release of Tenant's liability for the same, Tenant
agrees  to  instruct  the  assignee  to pay such  sums and  other  consideration
directly  to  Landlord).  If for any  sublease,  Tenant  receives  rent or other
consideration,  either initially or over the term of the sublease,  in excess of
the rent fairly  allocable  to the portion of the  Premises  which is  subleased
based on square  footage,  Tenant agrees to pay to Landlord as  additional  rent
fifty  percent  (50%)  of the  excess  o