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Exhibit 10.16    
    


 
 

PRESTONWOOD
  T O W E R    
    


PRESTONWOOD
TOWER 


OFFICE
LEASE 


SYNGENCE,
L.L.C.

SUITE 1100 







 
 
 

INDEX    
    



	PARAGRAPH 1	 	Basic Provisions
	 	 	(a)	 	Tenant
	 	 	(b)	 	Premises
	 	 	(c)	 	Basic Rental
	 	 	(d)	 	Security Deposit
	 	 	(e)	 	Lease Term
	 	 	(f)	 	Estimated Commencement Date
	 	 	(g)	 	Operating Expense Stop
	 	 	(h)	 	Permitted Use
	 	 	(i)	 	Parking Rights
	

PARAGRAPH 2	
 	

Lease Grant
	

PARAGRAPH 3	
 	

Lease Term
	

PARAGRAPH 4	
 	

Construction of Finish Work in Premises
	

PARAGRAPH 5	
 	

Tenant's Basic Rental Obligation
	 	 	(a)	 	Basic Rental
	 	 	(b)	 	Security Deposit
	

PARAGRAPH 6	
 	

Tenant's Additional Rental Obligation
	 	 	(a)	 	Additional Rental
	 	 	(b)	 	Adjustment of Actual Operating Expenses
	 	 	(c)	 	Actual Operating Expenses Enumerated
	 	 	(d)	 	Estimated Actual Operating Expenses
	 	 	(e)	 	Rentable Area
	 	 	(f)	 	Tenant's Right to Audit
	 	 	(g)	 	No Reduction in Basic Rental
	

PARAGRAPH 7	
 	

Automatic Transfer
	 	 	(a)	 	Landlord Option to Collect via Automatic Transfer
	 	 	(b)	 	Tenant Pays All Fees
	 	 	(c)	 	Tenant Notifies of Bank Change
	 	 	(d)	 	Mistake in Debit
	 	 	(e)	 	Failure to Comply Is a Lease Default
	

PARAGRAPH 8	
 	

Landlord's Obligations
	 	 	(a)	 	Water, Heat, Air Conditioning, Janitorial and Elevator Service and Maintenance Obligations
	 	 	(b)	 	Electrical Service
	 	 	(c)	 	Interruption of Services
	 	 	(d)	 	Discontinuance of Service
	

PARAGRAPH 9	
 	

Tenant's Covenants
	 	 	(a)	 	Alterations
	 	 	(b)	 	Mechanic's and Materialmen's Liens
	 	 	(c)	 	Permitted Use of Premises
	 	 	(d)	 	Repairs
	 	 	(e)	 	Purchase of Parking Rights
	 	 	(f)	 	Compliance with ADA
	 	 	(g)	 	Hazardous Materials
	

PARAGRAPH 10	
 	

Assignment and Subletting
	 	 	(a)	 	Assignment or Subletting by Tenant
	 	 	(b)	 	Continuing liability
	 	 	(c)	 	Excess Rents
	

PARAGRAPH 11	
 	

Indemnity and Insurance
	 	 	(a)	 	Casualty Insurance
	 	 	(b)	 	Liability Insurance
	 	 	(c)	 	Waiver of C1aimq
	 	 	 	 	 	 	 





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	 	 	(d)	 	Indemnity
	

PARAGRAPH 12	
 	

Fire or Casualty
	

PARAGRAPH 13	
 	

Condemnation
	

PARAGRAPH 14	
 	

Default and Remedies
	 	 	(a)	 	Events of Default
	 	 	(b)	 	Remedies
	 	 	(c)	 	Effect of Suit or Partial Collection
	 	 	(d)	 	Remedies Cumulative
	

PARAGRAPH 15	
 	

Surrender of Premises
	 	 	(a)	 	Surrender
	 	 	(b)	 	Removal of Alterations and Tenant's Property
	

PARAGRAPH 16	
 	

Holding Over
	

PARAGRAPH 17	
 	

Mortgages
	

PARAGRAPH 18	
 	

Certain Rights Reserved by Landlord
	 	 	(a)	 	Common and Service Area Alterations
	 	 	(b)	 	Parking
	 	 	(c)	 	Rules and Regulations
	 	 	(d)	 	Food-Preparation
	 	 	(e)	 	Security Measures
	 	 	(f)	 	Right To Relocate Tenant
	

PARAGRAPH 19	
 	

Miscellaneous
	 	 	(a)	 	Time Is of the Essence
	 	 	(b)	 	Force Majeure
	 	 	(c)	 	No Personal Liability of Landlord
	 	 	(d)	 	Quiet Enjoyment
	 	 	(e)	 	Entire Agreement and Amendments
	 	 	(f)	 	Interpretation, Applicable Law, Exclusive Venue and Service of Process
	 	 	(g)	 	Severability
	 	 	(h)	 	Terms Binding
	 	 	(i)	 	Estoppel Certificates
	 	 	(j)	 	Late Payment Charge and Interest Payable
	 	 	(k)	 	Security Deposit
	 	 	(1)	 	Access to Premises
	 	 	(m)	 	Notices
	 	 	(n)	 	Acceptance of Premises and Building by Tenant
	 	 	(o)	 	Building Name
	 	 	(p)	 	Landlord's Lien
	 	 	(q)	 	Authority to Sign Lease
	 	 	(r)	 	Attorneys' Fees, Costs and Expenses
	 	 	(s)	 	Execution of Lease
	 	 	(t)	 	No Attornment
	 	 	(u)	 	Arms-Length Transaction
	 	 	(v)	 	Notice and Cure
	 	 	(w)	 	Limitation of Tenant's Time to Sue
	 	 	 	 	(i)	 	Commencement of Action
	 	 	 	 	(ii)	 	Tenant Acknowledgment
	 	 	(x)	 	Exhibits and Riders
	

PARAGRAPH 20	
 	

Special Provisions.




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PRESTONWOOD TOWER OFFICE LEASE    
    


        THIS LEASE (herein so called) is made as of the 28th day of June, 2004 by and between Prestonwood Tower, Ltd.
("Landlord"), and the Tenant named below. 


 
 

WITNESSETH:    



        1.    Basic Provisions.    



	(a)	Tenant:	Syngence, L.L.C.

5485 Beltline Road, #200
 Dallas, Texas 75254
	

(b)	

Premises:	
Suite 1100

5151 Belt Line Road

Dallas, Texas 75254
	

 	

Approximate Rentable Area:	
5,061 square feet (RA).
	

 	

Approximate Usable Area:	
4,520 square feet (CIA).
	

(c)	

Basic Rental:	
Months 1-8.5: -0-$ Per month; rental rate per square foot (RA): $-0-. Basic Rental is abated for the first 8.5 months.
	

 	

Aug 1-May 15, 05	
Months 8.5: $3,374.00 per month; annual rental rate per square foot (RA): $16.00.
	

 	

 	
Months 8.5 - 36: $6,748.00 per month; annual rental rate per square foot (RA): $16.00.
	

 	

 	
Months 37 - 60: $7,169.76 per month, annual rental rate per square foot (RA) $17.00
	

(d)	

Security Deposit:	
$14,339.52
	

(e)	

Lease Term:	
Five (5) Years
	

(f)	

Estimated Commencement Date:	
August 1, 2004
	

(g)	

Operating Expense Stop:	
2004 Actual Operating Expenses
	

(h)	

Permitted Use:	
Administrative offices
	

(i)	

Parking Spaces:	
Two (2) reserved parking spaces, Fifteen (15) covered parking spaces, and fifteen (15) surface parking spaces at no charge throughout the term of the lease.






        2.    Lease Grant.    


        Landlord
hereby leases to Tenant and Tenant hereby leases from Landlord the Premises described above, which are shown in  Exhibit A-1 attached hereto. The Premises are located in the building described above
(the
"Building"), located on the real property described in Exhibit A-2 attached hereto
(the "Land"). The Land, the Building, the parking facilities, parking garage and other structures and improvements, landscaping, fixtures, appurtenances
and other common areas now. or hereafter placed, constructed or erected thereon comprise the project (the "Project") known as the Prestonwood Tower
Office Building in Dallas, Dallas County, Texas. This Lease is granted subject to the terms hereof, the rights and interests of third parties under existing liens, easements and encumbrances affecting
such 


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property,
all zoning regulations, rules, ordinances, building restrictions and other laws and regulations now in effect or hereafter adopted by any governmental authority having jurisdiction over the
Project or any part thereof. 


        3.    Lease Term.    


        This
Lease shall be for the term of years described above, commencing on the earlier of (a) the date Tenant takes possession of the Premises for the conduct of business or
(b) August 1, 2004. 


        The
date the Lease Term commences shall be referred to in this Lease as the "Commencement Date." If the Lease Term expires on a date other
than the last day of a calendar month, Landlord and Tenant shall be deemed to have agreed that the Lease Term shall be extended through the last day of the calendar month in which the termination date
falls and Tenant shall be and remain liable to Landlord for all obligations hereunder applicable to such extended Lease Term, including but not limited to, all Basic Rental and Additional Rental
associated therewith. Notwithstanding anything to the contrary contained or implied elsewhere herein, Landlord shall not be liable for failure to give Tenant possession of the Premises on the
beginning date of the Lease Term for any reason whatsoever, including, but not limited to, the failure of any other tenant of Landlord to vacate all or any portion of the Premises. Rent shall be
payable as of the beginning of the Lease Term unless Landlord is unable to give possession. Rent shall then be payable as of the date possession is available to Tenant. The ending date of the Term
will not change. 


        4.    Construction of Finish Work in Premises.    


        Landlord
agrees to construct leasehold improvements (the "Finish Work") more particularly described on  Exhibit A attached hereto and fully incorporated herein
by reference for all purposes in a good and workmanlike manner in and upon the Premises
at Tenant's sole cost and expense, so long as the cost of the Finish Work does not exceed
$                        per rentable square foot of
the Premises (the "Finish Allowance") in accordance with construction drawings approved by both Landlord and Tenant. Tenant agrees to spend at least
$38.767.26 for construction. Any costs to be incurred for construction by Landlord in excess of the
Finish Allowance shall be paid by Tenant to Landlord promptly upon demand prior to Landlord's commencing construction. Change orders requested by Tenant and approved by Landlord
after construction has commenced and which increase the cost of construction shall be paid by Tenant to Landlord promptly upon demand. All installations and improvements now or hereafter placed in the
Premises other than Building Standard (as hereinafter defined) improvements shall be for Tenant's account and at Tenant's cost (and Tenant shall pay ad valorem taxes and increased insurance thereon or
attributable thereto), which cost shall be payable by Tenant to Landlord upon demand as Additional Rental. "Building Standard" shall mean the type,
brand and/or quality of materials Landlord designates from time to time to be the minimum quality to be used in the Building or the exclusive type, grade or quality of material to be used in the
Building. If Landlord is delayed in completing such construction within the specified time, the delay in commencement of Tenant's obligation to pay rent hereunder shall constitute full settlement of
all claims that Tenant may have against Landlord based on the delay. If Landlord is unable to complete the Finish Work within the specified time due to a delay caused by Tenant or for any other cause
related to Tenant's acts or omissions, Tenant's rental obligations under this Lease shall begin on the date on which Landlord would have delivered possession of the Premises to Tenant absent such
delay, and such date shall be the Commencement Date. In the event construction is not substantially complete, other than delay caused by Tenant, on or before six
(6) months after execution of this Lease, then Tenant shall have the option to cancel this Lease by giving ten (10) days prior written notice to Landlord unless construction is
substantially completed prior to the expiration of the ten (10) day period. 


        5.    Tenant's Basic Rental Obligation.    


        (a)    Basic Rental.    Beginning on the Commencement Date, Tenant shall pay to Landlord the Basic Rental without
demand, deduction or setoff, for each month of the entire Lease Term. If the day 


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on
which Basic Rental is first due is other than the first day of a calendar month, rent for such partial month shall be prorated on a daily basis. All Basic Rental shall be paid by Tenant to Landlord
in advance on or before the first day of each calendar month during the Lease Term; provided, however, if the first day of any calendar month during the Lease Term falls on any day which is a
Saturday, Sunday or legal holiday pursuant to the laws of the State of Texas, Basic Rental shall be paid by Tenant to Landlord for such calendar month in advance on or before the last day of the
immediately preceding calendar month which is not a Saturday, Sunday or legal holiday pursuant to the laws of the State of Texas. All rental and other payments which are due hereunder shall be made
payable to Landlord. Tenant agrees to pay said rental and other payments to Landlord at 5151 Belt Line Road, Suite 650, Dallas, Texas 75254, Attention: Building Manager, or at such other place as may
from time to time be designated in writing by Landlord, in lawful money of the United States of America without any prior demand therefor and without any deduction or setoff whatsoever. 



        (b)    Security Deposit.    Tenant shall deposit with Landlord the amount shown above as a Security Deposit
contemporaneously with the execution hereof. Tenant's Security Deposit shall be held in accordance with the terms of Paragraph 19(k). 


        6.    Tenant's Additional Rental Obligation.    


        (a)    Additional Rent.    Beginning on the Commencement Date, Tenant shall pay to Landlord each calendar year
additional rent (the "Additional Rent") equal to Tenant's proportionate share of the Actual Operating Expenses (defined below) for the Building for such
calendar year in excess of the Operating Expense Stop multiplied by the number of square feet of Rentable Area in the Demised Premises. Additional Rent shall be prorated on a daily basis for each
partial calendar year in the Lease Term. Tenant's proportionate share shall be based on the ratio which the Rentable Area in the Demised Premises (adjusted for office expansions) bears to the Rentable
Area within the Building. Tenant's proportionate share is 2.2% and the Operating Expense Stop as used in this Lease shall be the excess of Actual Operating Expenses in excess
of those for the Base Year. The Base Year for the purposes of this Lease shall be 2004. 



        (b)    Adjustment of Actual Operating Expenses.    Notwithstanding any language herein to the contrary, if the
Building is not fully occupied during any calendar year of the Lease Term, Actual Operating Expenses shall be determined as if the Building had been fully occupied during such year. For the purposes
of this Lease, "fully occupied" shall mean occupancy of one hundred percent (100%) of the Rentable Area in the Building. 


        (c)    Actual Operating Expenses Enumerated.    Actual operating expenses (the "Actual
Operating Expenses") shall include all reasonable expenses, costs and disbursements of every kind and nature incurred or paid by
Landlord in connection with the ownership and/or the operation, maintenance, repair and security of the Project, including (without limitation) such expenses as utility costs, wages and administration
expenses [including salaries and wages, social security, unemployment compensation, insurance and other employee benefits and indirect compensation], landscaping, maintenance
and repair costs, costs of independent contractors, fees (other than legal fees directly related to leasing activities of Landlord), insurance premiums and real estate taxes, sales, use or excise
taxes and other governmental assessments. Actual Operating Expenses shall exclude the capitalized cost of permanent improvements (other than those installed to reduce operating costs or as may be
required by law); interest, amortization or other payments on loans to Landlord (other than that incurred to finance items which are included in Actual Operating Expenses); all costs reimbursed to
Landlord out of insurance proceeds or from tenants or other sources not affiliated with Landlord; and depreciation of the Building. 


        (d)    Estimated Actual Operating Expenses.    Landlord shall have the right to  reasonably estimate Additional Rental to accrue
hereunder and Tenant shall pay to Landlord the amount of such estimate monthly with Tenant's Basic
Rental payments. If Landlord estimates Additional Rental in advance, then 


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by
each April 1 or as soon thereafter as practical, Landlord shall furnish to Tenant a statement of Landlord's Actual Operating Expenses for the previous calendar year. Notwithstanding anything
to the contrary contained or implied elsewhere herein, it is expressly agreed that Landlord's failure to estimate Additional Rental and/or to provide same to Tenant by April 1st of each year
(or as soon thereafter as practicable), and/or Landlord's failure to furnish to Tenant a statement of Landlord's Actual Operating Expenses for any calendar year shall in no way excuse or release
Tenant from Tenant's continuing obligation to pay Tenant's portion of Landlord's Actual Operating Expenses for the applicable year or constitute a waiver, release or relinquishment of Landlord's
continuing right to bill and collect Tenant's portion of Landlord's Actual Operating Expenses for the applicable year front Tenant. If for any calendar year Tenant's Additional Rental collected for
the prior year, as a result of payment of Tenant's estimated Additional Rental, is in excess of Tenant's Additional Rental actually due during such prior year, then, so long as Tenant is not in
default hereunder, Landlord shall refund to Tenant any overpayment (or, at Landlord's option, apply such amount against rentals due or to become due hereunder). Likewise, Tenant shall pay to Landlord,
on demand, any underpayment with respect to the prior year. 



        (e)    Rentable Area.    As used in this Lease the term "Rentable Area" means the aggregate of the Usable Area (as
hereinafter defined) plus the product of the Usable Area times twelve percent (12%). As used in this Lease the term "Usable Area" means: 




        (i)    In
the case of a single tenancy floor, all floor area measured from the inside surface of the outer glass or finished column or exterior walls of the Building to the
inside surface of the opposite exterior wall, excluding only the areas (hereinafter "Service Areas") within the exterior walls used for elevator mechanical rooms, building stairs, fire towers,
elevator shafts, flues, vents, stacks, pipe shafts and vertical ducts, but including any Service Areas which are for the use of the particular tenant such as special stairs or elevators, elevator
foyers, rest rooms, mechanical, electrical and telephone rooms, janitor closets, vending area and corridors; 


        (ii)   In
the case of a floor to be occupied by more than one tenant, all floor areas within the inside surface of the outer glass or finished column or exterior walls
enclosing the portion of the Premises on such floor and measured to the mid-point of the walls separating areas leased by or held for lease to other tenants or from areas devoted to
corridors, elevator foyers, rest rooms, mechanical rooms, janitor closets, vending areas, and all other similar facilities for the use of all tenants on a particular floor (hereinafter sometimes
called "Common Areas"); and 


        (iii)  The
Rentable Area in the Premises has been calculated on the basis of the foregoing definition and is hereby conclusively stipulated for all purposes hereof to be  5,061 square feet, whether the same
should be more or less as a result of variations resulting from actual construction and completion of the Premises for occupancy. 





        (f)    Tenant's Right to Audit.    In the event that Tenant's pro rata share of Actual Operating Expenses increases by
more than five percent (5%) in any Lease Year, Tenant, at its expense, shall have the right, so long as Tenant is not then in default hereunder (and no event or condition then exists which, with the
giving of notice and/or lapse of time, would constitute such a default) for a period of thirty (30) days following receipt of notice from Landlord specifying Tenant's pro rata share of Actual
Operating Expenses to audit, at any reasonable time during regular business hours of the Landlord at the place where Landlord's books and records are maintained [with such books and
records being currently maintained by Landlord in its New York offices and with the continuing right of Landlord to move such books and records to another business location of Landlord upon five
(5) days written notice thereof by Landlord to Tenant] upon fourteen (14) days prior written notice to Landlord, Landlord's books and records relating to Operating Expenses
with respect to the year to which such notice relates, or at Landlord's sole discretion, in lieu of Tenant conducting such audit, Landlord will 


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provide
(at Tenant's expense) such audit prepared by a certified public accountant. Tenant shall provide Landlord a copy of any audit obtained by Tenant within fifteen (15) days of Tenant's
receipt thereof. All fees, costs and expenses incurred in connection with such audit (including, but not limited to, copying costs), whether performed at Tenant's direction or provided by Landlord,
shall be paid by Tenant immediately upon presentation of a statement therefor. In the event such audit shall establish that Landlord's statement of Tenant's pro rata share of Actual Operating Expenses
as set forth in such notice exceeded Tenant's pro rata share of Actual Operating Expenses actually due and Tenant shall have theretofore paid such incorrect amount, such excess amount paid by Tenant
shall be credited against the next maturing installments due from Tenant to Landlord for Tenant's pro rata share of the Actual Operating Expenses. If no installment is due, and
if Tenant is not then in default under this Lease and no event or circumstance then exist which with the giving of notice, passage of time or both, would constitute an event of default of this Lease,
such excess amount paid by Tenant shall be credited to the next maturing installment of Basic Rental due from Tenant to Landlord. In the event such audit shall establish that
Landlord's statement of Tenant's pro rata share of Actual Operating Expenses as set forth in such notice was less than Tenant's pro rata share actually due, Tenant shall pay to Landlord as Additional
Rental such excess amount due within thirty (30) days following presentation of a statement therefor. Notwithstanding anything to the contrary set forth herein, no such audit shall be conducted
by Tenant if any other tenant in the Building has conducted an audit for the year Tenant intends to audit and Landlord furnishes a copy of the results of such audit to Tenant. No sublessee shall have
any right to conduct an audit and no assignee of Tenant shall have any right to conduct an audit for any period of time during which such assignee was not in possession of the Premises with the prior
written consent of Landlord. Notwithstanding anything to the contrary contained or implied elsewhere herein, Tenant shall have no right to initiate or continue any audit pursuant to the terms of this  Paragraph 6(f)
 nor shall Landlord be required to refund and/or credit any incorrect amount collected by Landlord in excess of Tenant's pro rata
share of Actual Operating Expenses actually due in the event that Tenant has not first fully paid all of its monthly installments of estimated pro rata share of Landlord's Actual Operating Expenses
and any underpayment of same for any prior year. 


        (g)    No Reduction in Basic Rental.    Nothing contained in this Paragraph 6 shall be construed at any time so
as to reduce the monthly installments of Base Rental payable hereunder below the amount set forth in Paragraph 5 of this Lease. 


        7.    Automatic Transfer.    


        (a)    Landlord Option to Collect via Automatic
Transfer.    Instead of requiring Tenant to pay Basic Rental, Additional Rental or other charges in a manner pursuant to
Paragraph 5, Paragraph 6 or any other paragraphs of this Lease, Landlord may, at its sole option, upon not less than thirty (30) days prior notice to Tenant require Tenant to
promptly execute and deliver to Landlord any documents, instruments, authorizations, or certificates required by Landlord to give effect to an automated debiting system, whereby any and all payments
by Tenant (as designated from time to time by Landlord) of whatsoever nature required or contemplated by this Lease shall be debited monthly or from time to time, as determined by Landlord, from
Tenant's account in a bank or financial institution designated by Tenant and credited to Landlord's bank account as Landlord shall designate from time to time. 


        (b)    Tenant Pays All
Fees.    Tenant shall promptly pay all service fees and other charges connected therewith, including, without limitation, any
charges resulting from insufficient funds in Tenant's bank account or any charges imposed on the Landlord. 


        (c)    Tenant Notifies of Bank
Change.    In the event that Tenant elects to designate a different bank or financial institution from which any Basic Rental,
Additional Rental, or other charges under this Lease are automatically debited, notification of such change and the required documents, instruments, authorizations, and certificates specified in
Paragraph 7(a) must be received by Landlord no later than thirty (30) days prior to the date such change is to become effective. 


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        (d)    Mistake in
Debit.    Tenant agrees that it shall be and remain fully responsible to Landlord for all payments of Basic Rental, Additional
Rental and other charges pursuant to this Lease, even if Tenant's bank account is incorrectly debited in any given month. Such Basic Rental, Additional Rental and other charges shall be immediately
payable to Landlord upon written demand. 


        (e)    Failure to Comply Is a Lease
Default.    Tenant's failure to properly designate a bank or financial institution or to promptly provide appropriate
documentation, instruments, authorizations, certificates and/or information in accordance with the terms, provisions and requirements of this Paragraph 7 shall constitute a default by Tenant
under this Lease. 


        8.    Landlord's Obligations.    


        (a)    Water, Heat, Air Conditioning, Janitorial and Elevator Service and Maintenance Obligations.    Subject to the
limitations set forth herein and in the Rules and Regulations, Landlord agrees to furnish Tenant while occupying the Premises and while Tenant is not in default under this Lease: (i) water (hot
and cold) at those points of supply provided for general use of tenants of the Building; (ii) Building Standard heat and air conditioning in season, as determined by Landlord, weekdays (other
than holidays) between 7:00 a.m. and 7:00 pm., and Saturdays between 7:00 am. and 1:00 p.m., at such temperatures and in such amounts as are reasonably considered by Landlord to be
standard (Landlord shall only furnish heat and air conditioning weekdays after 7:00 p.m., on Saturdays after 1:00 p.m., and on Sundays and holidays at the written request of Tenant, and
at Tenant's sole cost and expense payable within fifteen (15) days after receipt of an invoice); (iii) Building Standard janitorial service on weekdays other than holidays for Building
installations and Building Standard window washing; (iv) operatorless passenger elevators for ingress and egress to the floor on which the Premises are located; and (v) replacement of
Building Standard light bulbs and fluorescent tubes, but Landlord's standard charge for such bulbs and tubes shall be paid by Tenant. Landlord additionally
agrees to maintain in the Building the exterior walls, roof, windows (provided, however, that Landlord's duty with respect to windows shall only include the repair of breakage to windows not caused by
Tenant or its agents, employees, invitees, contractors, subcontractors, licensees or tenants, and shall not include repairs related to the tinting of the windows or any damage to such tinting),
structural steel, load-bearing nondemising walls, floors below the level of Tenant's floor covering and the HVAC, electrical and plumbing systems serving the Premises, but located outside
the Premises, subject to the terms and conditions of this Lease which may limit Landlord's maintenance, repair and rebuilding obligations under various circumstances. 



        (b)    Electrical Service.    Landlord shall [subject, however, to the controlling terms and provisions of
Paragraph 8(d) below] utilize commercially reasonable efforts to make available electrical current for Tenant's use of typewriters, computers, copy machines, printers, servers voice
writers, calculating machines and other machines of similar low electrical consumption, special lighting in excess of Building Standard or any other item of electrical equipment which consumes more
than machines of low electrical consumption or requires voltage of more than 120 220 volts, provided, however,
that all costs for extraordinary or unusual demand for electrical service shall be borne by Tenant in addition to any other costs for electrical current to be paid by Tenant to Landlord pursuant to
any of the other terms and provisions of this Lease. Landlord agrees that Tenant's use of the electrical service complies fully with this paragraph.


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        (c)    Interruption of Services.    Failure to any extent to make available, or any slow-down, stoppage or
interruption of any services described in this paragraph, resulting from any cause whatsoever (other than Landlord's sole gross negligence) shall not render Landlord liable in any respect for damages,
nor be construed as an eviction of Tenant, nor relieve Tenant from fulfillment of any covenant or agreement hereof. Should any service being furnished by Landlord be interrupted for any cause
whatsoever, Tenant shall notify Landlord and Landlord shall use reasonable diligence to restore such service promptly. Tenant shall be entitled to an equitable diminution of rent based upon the
percentage area of the Premises which is rendered unfit for occupancy for the Permitted Use, if such interruption or termination of service continues for more than ten (10) consecutive business
days. Tenant's right to an equitable diminution of rent shall be Tenant's sole and exclusive remedy in the event of an occurrence specified herein. 


        (d)    Discontinuance of
Service.    Landlord reserves the right, upon not less than thirty (30) days written notice to Tenant, to discontinue
the availability of electrical service to the Premises. If Landlord elects such option, Tenant will contract directly with such public utility for the continuance of service to the Premises (subject
to the prior written approval by Landlord of the electrical service provider in Landlord's sole and absolute discretion, judgment and opinion) and Landlord shall thereafter have no further
responsibility to make such electrical service available to Tenant. 


        (e)   It
is expressly agreed and understood that (i) Landlord expressly reserves and retains the right to designate, in Landlord's sole and absolute discretion,
judgment and opinion, the electrical utility provider and any other public or quasi-public utility provider to be utilized by Landlord and/or Tenant at any time and from time to time during the Lease
Term in connection with the Premises and/or any other portion of the Project and (ii) Landlord would not execute this Lease without expressly reserving and retaining such right. Accordingly,
Landlord shall have the right at any time and from time to time during the Lease Term to either contract for service from a different company or companies currently providing electricity and/or other
utility service (each such company shall hereinafter be referred to as an "Alternate Service Provider") or continue to contract for service from the current utility service providers ("Existing
Service Providers"). Tenant shall cooperate with Landlord, the Existing Service Providers and any Alternate Service Provider at all times and from time-to-time, and, as
reasonably necessary, shall allow Landlord, Existing Service Providers and any Alternate Service Provider reasonable access to the Project's electric lines, feeders, risers, wiring, and any other
machinery located or situated within the Premises. Landlord shall in no way be liable or responsible for any loss, or expense that Tenant may sustain or incur by reason of any change, failure,
interference, disruption or defect in the supply or character of the electric energy or other utility service furnished to the Premises, the Building or the Project, or if the quantity or character of
the electric energy or utility service supplied by the Existing Service Providers or any Alternative Service Provider is no longer available or suitable for Tenant's requirements and no such change,
failure, defect, unavailability, or unsuitability shall constitute an actual or constructive eviction, in whole or in part, or (except to the extent otherwise expressly set forth in
Paragraph 8(c) above), entitle Tenant to any abatement or diminution of rent, or relieve Tenant from any of its obligations under this Lease. 



        9.    Tenant's Covenants.    Tenant covenants and agrees as follows: 


        (a)    Alterations.    Tenant shall make no alterations, changes or improvements to the Premises without first
submitting to Landlord plans and specifications therefor and obtaining the prior written consent of Landlord, such consent not to unreasonably withheld, delayed or
conditioned. Any approval by Landlord of any plans and specifications shall not be, nor shall it be deemed to be, a representation or warranty by Landlord that such plans and
specifications comply with applicable laws, rules, regulations or requirements of applicable governmental entities or that work when done in accordance with such approved plans and specifications will
be safe or structurally sound. All work done by Tenant shall be performed in a good and workmanlike manner, in compliance with applicable laws and at such times and in such manner as not to cause
interference with construction in progress or with other tenants in 


7







 



the
Building. All contractors and/or subcontractors performing such work must first be approved in writing by Landlord and must provide and maintain in full force and effect such insurance as Landlord
may reasonably require. 


        (b)    Mechanic's and Materialmen's Liens.    Tenant shall have no authority or power, express or implied, to create
or cause any mechanic's or materialmen's lien, charge or encumbrance of any kind against the Premises or the Project or any portion thereof. Tenant shall promptly cause any such liens which have
arisen by reason of any work claimed to have been undertaken by, through or under Tenant to be fully and finally released by payment, bonding or other method acceptable to Landlord in its sole and
absolute discretion, judgment and opinion within thirty (30) days after request by Landlord, and shall indemnify Landlord against losses, costs and expenses (including, but not limited to,
reasonable attorneys' fees and costs of suit) arising out of any such claim. 


        (c)    Permitted Use of Premises.    Tenant shall not permit the Premises to be used for any purpose other than for
the use specified in Paragraph 1 of this Lease. Tenant shall at all times comply with applicable laws, ordinances, rules and regulations in
Tenant's use and/or occupancy of the Premises, whether now existing or hereafter enacted. In the event that any law, ordinance, rule or regulation concerning Tenant's use and/or occupancy of the
Premises is passed by any agency, council or other governmental or quasi-governmental body having jurisdiction and such law, ordinance, rule or regulation is silent as to whether the Landlord or the
Tenant is responsible for compliance therewith or, alternatively, responsibility for compliance is placed on either or both the Landlord and the Tenant, Tenant agrees that Tenant will at Tenant's sole
cost and expense comply with said law, ordinance, rules or regulations. Notwithstanding anything to the contrary contained or implied elsewhere in this Lease [including, but not limited
to, the Permitted Use set forth in Paragraph 1(h) above], it is expressly agreed and understood that Tenant may not engage in any
activity which would cause the number of employees located at any one time upon the premises to exceed Thirty (30) persons. 



        (d)    Repairs.    Tenant will not in any manner deface or injure the Premises, Building, Project or any part thereof
and will pay the cost of repairing and replacing any damage or injury done to the Premises, Building, Project or any part thereof by Tenant or Tenant's agents, contractors, subcontractors or
employees. Tenant shall throughout the Lease Term keep the Premises free from deterioration, waste and nuisance of any kind, excluding ordinary and customary wear and tear and damage resulting from a
fire or unavoidable casualty not caused by the willful act or omission of Tenant or Tenant's agents, contractors, subcontractors or employees. Tenant
agrees to keep the Premises in good condition and repair and Tenant shall make all necessary repairs and replacements. If Tenant fails to make such repairs and/or replacements within fifteen
(15) days after notice from Landlord, Landlord may at its option make such repair and/or replacements, and Tenant shall upon demand pay Landlord for the cost thereof. 


        (e)    Purchase of Parking Rights.    In addition to any other costs, charges or rentals payable
hereunder, Tenant shall be required to purchase parking rights for the spaces located in the Building garage at the rates established from time to time by Landlord or Landlord's garage operator. In
addition, Landlord or Landlord's garage operator may at any time issue, reissue or make available different substitute or replacement parking access cards, parking identification stickers or similar
parking access or identification cards, stickers or similar materials at a cost to Tenant in each instance of the greater of (i) Twenty-Five and No/100 Dollars ($25.00) or
(ii) the actual cost to Landlord or Landlord's garage operator in obtaining and providing same. Tenant shall be furnished thirty (30) access
cards upon move-in at no cost and Landlord will supply access cars at no cost for future employees added. However, anytime a card is lost and a replacement card is requested, Tenant will
be assessed a ten dollar ($10.00) lost card fee. Tenant further acknowledges and agrees that Tenant's invitees, licensees, employees,
agents, contractors and subcontractors shall strictly comply with any and all valet parking requirements as may be now or hereafter established and maintained by Landlord. 


8







 



        (f)    Compliance with ADA.    In the event that, during the Term of this Lease, it is determined that the Premises or
any improvements, personal property, fixtures or any other matter or thing comprising a portion of or located within the Premises must be removed, altered, modified, improved, reconstructed, added or
changed in order to cause the Premises, or any aspect thereof, to be in compliance with the requirements of Title III of' the Americans with Disabilities Act of 1990 (the "ADA"), as modified or
amended from time to time, such removal, alteration, modification, improvement, reconstruction, addition or change shall promptly be undertaken by the Tenant, at the sole cost of the Tenant, so that
the Premises and all aspects thereof shall be in compliance with the ADA and any other law, code, statute, regulation and ordinance applicable to the Premises. Prior to commencing work necessary to
cause the Premises to comply with the requirements of the ADA and all other applicable laws, codes, statutes, regulations and ordinances, the Tenant shall notify the Landlord of the work to be
undertaken by the Tenant in this regard. In the event that the Premises, the Building and/or the Project or any portion or aspect of any of them is hereafter determined to fail to comply with the ADA,
such failure of compliance shall not constitute a default or a failure of performance on the part of the Landlord pursuant to the terms and provisions of this Lease. In the event that the Landlord
determines, in its sole and absolute discretion, judgment and opinion, that portions of the Premises, the Building and/or the Project should be improved, altered, modified or otherwise changed in
order to cause the Premises, the Building and/or the Project, or any portion of any of them, to continue to be in compliance with
the requirements of the ADA, Landlord may, but shall have no obligation to, undertake such improvements, alterations, modifications or changes to the Premises, the Building and/or the Project, as the
Landlord, in its sole and absolute discretion, judgment and opinion, deems necessary to cause such improvements to comply with the requirements of the ADA. Notwithstanding anything to the contrary
contained in this Lease, all costs and expenses for labor, materials, architectural fees, engineering fees, overhead, insurance, maintenance, services or supplies incurred by the Landlord in causing
the Premises, Building and/or the Project or any portion thereof to comply or continue to comply with the requirements of the ADA shall be reimbursed to the Landlord as an additional component of the
Actual Operating Expenses in accordance with the terms and provisions of this Lease. Landlord agrees that the Premises will be delivered to Tenant in full compliance with all
ADA laws and regulations in effect as of the date of execution of this Lease for general office purposes. 



        (g)    Hazardous Materials.    Tenant shall not, without Landlord's prior written consent, use, generate, manufacture,
refine, transport, treat, store, handle or dispose of Hazardous Materials on, in, or about the Premises. As used herein, the term "Hazardous Materials" shall mean (i) any toxic substance or
hazardous waste, substance or related material, or any pollutant or contaminant; (ii) radon gas, asbestos in any form which is or could become friable, urea formaldehyde foam insulation,
petroleum and petroleum products, transformers or other equipment which contain dielectric fluid containing levels of polychlorinated biphenyls in excess of federal, state or local safety guidelines,
whichever are more stringent; (iii) any substance, gas, material or chemical which is or may hereafter be defined as or included in the definition of "hazardous substances," "toxic substances,"
"hazardous materials," "hazardous wastes" or words of similar import under any Environmental Laws. Tenant shall, at its sole cost and expense, comply with every applicable statute, law, ordinance,
code, regulation, order, permit, approval, license, judgment, restriction or rule of any federal, state, municipal or other public or quasi-public body, agency, court, department, bureau, officer or
authority having jurisdiction over the Premises or Tenant relating to the protection of health or the environment, including without limitation the Comprehensive Environmental Response, Compensation
and Liability Act of 1980, as amended, 42 U.S.C. §9.061 et seq; the Hazardous Materials Transportation Act, as amended, 49 U.S.C.
§1801 et seq.; the Resource Conservation and Recovery Act, as amended, 42 U.S.C. §6901 et
seq.; the Federal Water Pollution Control Act, as amended, 33 U.S.C. §1251 et seq.; the Texas Solid Waste Disposal
Act, Texas Civil Statutes, Article 4477 et seq.; Texas Water Code Ann. chapter 678, Texas Oil and Hazardous Substances Spill Contingency Plan,
Texas Water Code Ann., Texas Industrial Waste 


9







 



Management
Regulations, Texas Water Code, §5 et seq. (collectively, "Environmental Laws"), including, without limitation, Environmental Laws
relating or referring to the storage of all medical waste and Hazardous Materials. If Tenant receives any notice or acquires knowledge of a release or threat of release of any Hazardous Materials in,
on or about the Premises, or a notice with regard to air emissions, water discharges, noise emissions, recycling, violation of any Environmental Laws or any other environmental, health or safety
matter affecting Tenant or the Premises (an "Environmental Complaint") independently or by notice from any person or entity, including the Texas Water Commission, then Tenant shall give immediate oral
and written notice of same to Landlord detailing all relevant facts and circumstances. Landlord shall have the right, but not the obligation, to enter onto the Premises or to take such actions as it
deems necessary or advisable to cleanup, remediate, remove, resolve or minimize the impact of or otherwise deal with any Hazardous Materials, or the release or threat of release thereof, or deal with
any Environmental Complaint upon its obtaining knowledge of such matters independently or by receipt of any notice from any person or entity, including the Texas Water Commission. 


        10.    Assignment and Subletting.    



        (a)    Assignment or Subletting by Tenant.    Tenant shall not sell, assign or in any manner transfer this Lease or
any estate or interest herein or permit any transfer of Tenant's interest under this Lease (in whole or in part), directly or indirectly, either voluntarily or involuntarily, whether by operation of
law or otherwise (including, without limitation, by transfer of stock or other transfer of ownership of Tenant, merger, reorganization, dissolution or change in occupancy), or allow any lien or
encumbrance upon Tenant's interest in this Lease by operation of law or otherwise, or sublet the Premises or any part thereof, or grant any license, concession or other right of use or occupancy of
any portion of the Premises without the prior written consent of Landlord, which consent may be withheld or granted in Landlord's sole discretion, judgment and opinion (whether
reasonable or not) shall not be unreasonably withheld, delayed or conditioned. Tenant shall give Landlord ninety
(90) thirty (30) days prior written notice of any proposed assignment or other transfer and shall provide Landlord with all  reasonable
information regarding the proposed transfer as requested by Landlord. Consent of Landlord to one or more assignments or sublettings shall not
operate as a waiver of Landlord's continuing rights as to any subsequent assignment or subletting. Landlord's acceptance of any name for listing on the Building directory will not be deemed, nor will
it substitute for, Landlord's consent, as required by this Lease, to any sublease, assignment or other use and/or occupancy of the Premises. If in accordance with the terms and provisions hereof this
Lease is assigned, or if the Premises, or any part thereof, is sublet, or occupied by any one other than the Tenant, the Landlord may, at any time or from time to time, either before or after default
by the Tenant, elect to collect rent from the assignee, subtenant, or occupant and apply the net amount collected, exclusive of costs of collection, attorney's fees or other fees incurred by Landlord,
to the rent herein reserved. No such assignment, subletting, occupancy, or collection, and no acceptance by Landlord of such assignee, subtenant or occupant, as tenant, shall be deemed a waiver of any
covenant or a novation or release of Tenant (or any guarantor) from the further performance of the covenants in this Lease. Tenant shall not mortgage, pledge, create a lien or otherwise encumber its
interest in this Lease or the Premises. 


        (b)    Continuing Liability.    Notwithstanding any assignment or subletting, Tenant and any guarantor of Tenant's
obligations under this Lease shall at all times remain fully responsible and liable for the payment of the Basic Rental, Additional Rental and all other sums herein specified and for compliance with
all of Tenant's other obligations under this Lease (even if future assignments and sublettings occur subsequent to the assignment or subletting of Tenant, and regardless of whether or not Tenant's
approval has been obtained for such future assignments and sublettings). Moreover, in the event that the monthly rental due and payable by an assignee or sublessee (or a combination of the rent
payable under such assignment or sublease plus any bonus or other consideration therefor or incident thereto) exceeds the monthly installment of Basic Rental payable under this Lease, then 


10







 



Tenant
shall be bound and obligated to pay to Landlord all such excess rental and other excess consideration within ten (10) days following receipt thereof by Tenant from such sublessee,
assignee, licensee or other transferee, as the case may be. Further, in any event of any assignment or subletting it is understood and agreed that, in addition to any and all remedies of Landlord
under this Lease or at law or in equity, all rentals paid to Tenant by an assignee or sublessee shall be received by Tenant in trust for Landlord, to be forwarded immediately to Landlord without
offset or reduction of any kind, and upon election by Landlord such rentals shall be paid directly to Landlord (to be applied as a credit and offset to Tenant's obligations hereunder). 


        (c)    Excess Rents.    If any rents or other sums received by Tenant under any permitted sublease are in excess of
the rent and other sums payable by Tenant under this Lease (prorated for a sublease of less than 100 percent of the Premises), or if any additional consideration is paid to Tenant by any
assignee under any permitted assignment, then such excess rents minus any reasonable, normal and customary brokerage commission incurred by Tenant that is payable to an
unrelated third party broker and documented in writing under any permitted sublease or such additional consideration under a permitted assignment shall be paid by Tenant to
Landlord as additional rent hereunder within ten (10) days after Tenant receives the same. 


        11.    Indemnity and Insurance.    



        (a)    Casualty Insurance.    Tenant shall maintain at its sole cost and expense fire and extended coverage insurance,
on an "All-Risk" basis, on all of its personal property, furniture, fixtures and equipment, including removable trade fixtures, located in the Premises and on its leasehold improvements
and all additions and improvements made by Tenant in or to the Premises, for one hundred percent (100%) of the replacement cost thereof. 


        (b)    Liability Insurance.    Tenant shall procure and maintain throughout the Lease Term a policy or policies of
insurance, at its sole cost and expense, insuring Tenant and Landlord, its assigns and/or its successors in interest, as their respective interests may appear, against any and all liability for injury
to or death of a person or persons, occasioned by or arising out of or in connection with the use or occupancy of the Premises or by the condition of the Premises (including the contractual liability
of Tenant to indemnify
Landlord contained herein), the coverages and limits of such policy or policies to be not less than as set forth below (subject, however, to possible future increases as described below): 



	A.	Worker's Compensation

Employer's Liability	Statutory

$500,000	 
	

B.	

Commercial General

Liability

Bodily Injury

Property Damage	

$1,000,000 with respect

to any one occurrence and

$2,000,000 with respect

to the annual policy aggregate	

 
	

C.	

Umbrella Coverage	

$5,000,000	

 






        The
policy shall be issued by an insurance carrier with a Best's rating of A+ or better, endorsed to include Landlord, its assigns and/or successors in interest as an additional insured
(save and except for Worker's Compensation Insurance to the extent, if any, that applicable law precludes or prohibits Landlord from being named as an additional insured thereunder), with an express
loss payable endorsement in favor of Landlord, its assigns and/or its successors in interest, as their respective interests may appear, state that the insurance is primary over any other insurance
carried by Landlord, and shall include the following coverages (subject, however, to possible future increases as described below): 



	a)
	Premises
Operations 



11







 



	b)
	Independent
Contractors



	c)
	Contractual
coverage in support of Paragraph 11(d) of this Lease



	d)
	Personal
Injury Liability without exclusionary or limiting endorsements. 




        Each
policy shall include a Waiver of Subrogation in favor of the Landlord; its assigns and/or successors in interest. Evidence of these coverages represented by Certificate(s) of
Insurance issued by the applicable insurance carrier(s) must be furnished to Landlord prior to Tenant moving in. Certificates of Insurance shall specify the additional insured status mentioned above
as well as the Waivers of Subrogation. Such Certificate(s) of Insurance shall state that Landlord will be notified in writing thirty (30) days prior to cancellation, material change or renewal
of insurance. Notwithstanding anything to the contrary contained or implied elsewhere herein, Landlord shall have and hereby expressly retains the right to modify the insurance to be maintained by
Tenant under this Lease (including, but not limited to, the amount, type and scope of insurance to be maintained by Tenant hereunder) by written notice thereof to Tenant no more frequently than one
(1) time each calendar year during the Lease Term and any renewal or extension thereof (i) to the extent required by applicable law, ordinance, rule or regulation now or hereafter in
effect, (ii) to the extent required by any mortgagee holding a lien against the Building or Project or any portion thereof and/or (iii) to the extent determined by Landlord in its
reasonable discretion as being necessary, prudent or advisable. If Tenant fails to comply with the foregoing requirements relating to insurance, Landlord may obtain such insurance and Tenant shall pay
to Landlord immediately on demand the premium cost thereof. Notwithstanding anything to the contrary contained herein, to the extent that the terms of any mortgage, indenture, deed of trust or other
similar instrument regarding delivery of the proceeds of insurance to Landlord's mortgagee conflicts with the provisions hereof, the provisions of such mortgage, indenture, deed of trust or other
similar instrument shall govern and shall be superior to the rights of Tenant hereunder, with no further liability of Landlord or Landlord's mortgagee with regard thereto. 


        (c)    Waiver of Claims.    ANYTHING IN THIS LEASE TO THE CONTRARY NOTWITHSTANDING, TENANT HEREBY WAIVES ANY AND ALL
RIGHTS OF RECOVERY, CLAIM, ACTION OR CAUSE OF ACTION, AGAINST LANDLORD, ITS AGENTS, PARTNERS, OFFICERS, DIRECTORS, OR EMPLOYEES, FOR ANY LOSS OR DAMAGE THAT MAY OCCUR TO THE PREMISES, BUILDING AND/OR
THE PROJECT, OR ANY PART THEREOF, OR ANY IMPROVEMENTS THERETO, OR ANY PERSONAL PROPERTY OF TENANT THEREIN, BY REASON OF FIRE, THE ELEMENTS OR ANY OTHER CAUSE WHICH LOSS IS INSURED AGAINST UNDER THE
TERMS OF STANDARD FIRE AND EXTENDED COVERAGE INSURANCE POLICIES REGARDLESS OF CAUSE OR ORIGIN, INCLUDING NEGLIGENCE OF THE LANDLORD, ITS AGENTS, PARTNERS, OFFICERS, DIRECTORS OR EMPLOYEES. BECAUSE
THIS PROVISION WILL PRECLUDE THE ASSIGNMENT OF ANY CLAIM MENTIONED IN IT BY WAY OF SUBROGATION (OR OTHERWISE) TO AN INSURANCE'
COMPANY (OR ANY OTHER PERSON), TENANT AGREES TO GIVE IMMEDIATELY TO ANY INSURER THAT HAS ISSUED TO IT POLICIES OF FIRE AND EXTENDED COVERAGE INSURANCE WRITTEN NOTICE OF THE WAIVER BY TENANT CONTAINED
IN THIS PROVISION AND TO HAVE SUCH POLICIES ENDORSED, IF NEC7F.SSARY, TO PREVENT THE INVALIDATION OF INSURANCE COVERAGE BY REASON OF SUCH WAIVER. 


        (d)    Indemnity.    Tenant agrees to indemnify, defend and hold harmless Landlord and its partners, subsidiaries and
affiliated companies and their respective partners, officers, directors, employees and agents (all of the foregoing are hereinafter separately and collectively referred to as "Indemnitee") from and
against all claims, demands, costs, actions, causes of action, penalties, fines, assessments, losses (including, but not limited to, losses of use), damages to property, damages to persons (including,
but not limited to, damages for sickness, disease, personal injury, bodily injury and death), suits and 


12







 



liability
of every kind, including all expenses of investigation, remediation, defense, settlement or litigation, court costs and attorney's fees (including, but not limited to, all expenses of
litigation and reasonable attorney's fees incurred by Indemnitee in enforcing the provisions of this paragraph) paid, suffered or incurred by Landlord in connection with, or as a result of:
(a) damage to any property, or for injuries to or sickness or death of any person or party including, without limitation, Tenant or any invitee, licensee, employee, director, officer, servant,
contractor, subcontractor or tenant of Tenant caused by, arising out of or related, or which are alleged to be caused by, arising out of or related, directly or indirectly, to any  willful act or
omission on the part of Tenant or any invitee, licensee, employee, director, officer, servant, contractor, subcontractor or tenant of
Tenant, or to any breach, violation or nonperformance of any covenant of Tenant under this Lease or to the use of the Premises by Tenant and the conduct of its business therein, (b) damage to
any property, or for injuries to or sickness or death of any person or party, including, without limitation, Tenant or any invitee, licensee, employee, director, officer, servant, contractor,
subcontractor or tenant of Tenant, from any cause, which damage, injury, sickness or death occurs or is alleged to have occurred on or in the vicinity of the Land or arises out of or relates to or is
alleged to have arisen out of or be related to any such person's or party's presence on or in the vicinity of the Land or (c) the presence or release, or claim of presence or release, of any
Hazardous Materials in, on or about the Project as a result of the actions or inactions of Tenant, or any invitee, licensee, employee, director, officer, servant, contractor, subcontractor or tenant
of Tenant or the violation, or claim of violation, by Tenant, or any invitee, license; employee, director, servant, contractor, subcontractor or tenant of Tenant, of any Environmental Law. This
indemnity shall apply even though any such damage, injury, sickness or death is caused in whole or in part by any defect in or condition of any such premises or any defect in or condition of any area,
facilities, equipment, tools or other items which may be provided by Indemnitee, whether or not such defect or condition was known by Indemnitee. THIS INDEMNITY SHALL APPLY REGARDLESS OF WHETHER OR
NOT ANY SUCH DAMAGE, INJURY, SICKNESS OR DEATH IS CONTRIBUTED TO BY THE NEGLIGENCE OR FAULT OF INDEMNITEE, AND ALSO EVEN THOUGH INDEMNITEE IS STRICTLY LIABLE THEREFOR. Furthermore, this indemnity
shall include, without limitation, not only any claim or action for damages on account of injury to or sickness or death of any employee of Landlord or of any contractors or subcontractors hired by
Landlord (whether or not hired in the name of the Landlord) which is brought by such employee, but shall also include any claim or action by the representatives or beneficiaries of such employee who
is deceased, or by the Workers' Compensation insurance carrier of the Landlord or of any such contractors or subcontractors for the joint use and benefit of itself and such employee or such
representatives or beneficiaries, against Landlord, as provided in any applicable law. UNDER THE PROVISIONS OF THIS INDEMNITY, TENANT IS AGREEING TO INDEMNIFY INDEMNITEE FROM INDEMNITEE'S OWN
NEGLIGENCE OR FAULT, INCLUDING, BUT NOT LIMITED TO, ANY SUCH DAMAGE, INJURY, SICKNESS OR DEATH WHICH WAS CAUSED BY THE SOLE GROSS NEGLIGENCE OR SOLE FAULT OF INDEMNITEE AND WHICH WAS NOT CAUSED IN
PART BY THE NEGLIGENCE OR FAULT OF TENANT OR ANY INVITEE, LICENSEE, EMPLOYEE, DIRECTOR, OFFICER, SERVANT, CONTRACTOR, SUBCONTRACTOR OR TENANT OF TENANT OR ANY OTHER THIRD PERSON OR PARTY. If any
action or proceeding is brought by or against any Indemnitee in connection with any liability or claim, Tenant on notice from Indemnitee shall defend such action or proceeding, at Tenant's expense,
by or through attorneys reasonably satisfactory to Indemnitee. In addition, Tenant shall provide to Landlord upon demand, cash or other security acceptable to Landlord in its sole discretion, judgment
and opinion may deem necessary or advisable in order to assure that sufficient monies are available to defend such action or proceeding and to fully satisfy any potential liability or claims in
connection therewith in the event that the person or party bringing such action should ultimately prevail. The provisions of this paragraph apply to all activities of Tenant with respect to the Leased
Premises, whether occurring before or after the date of this Lease and before or after the expiration or termination of this Lease. Tenant's obligations under this Paragraph are not limited to the
limits or 


13







 

coverage
of insurance maintained or required to be maintained by Tenant under this Lease. Landlord shall not be liable to Tenant or any invitee, license; employee, director, officer, servant,
contractor, subcontractor or tenant of Tenant for theft, injury to persons and/or loss to property resulting from the criminal acts of third parties, including, without limitation, agents, employees,
invitees, licensees, customers and visitors of (i) Tenant, (ii) other tenants in the Project, or (iii) of Landlord. Notwithstanding anything to the contrary contained or implied
elsewhere herein, the terms and provisions of this Paragraph 11(d)shall expressly survive the termination or expiration of this Lease. 


        12.    Fire or Casualty.    



        In
the event that (a) the Premises or the Building should be so damaged by fire or other casualty that rebuilding or repairs cannot be completed within eighteen (18) months
after the date of commencement of reconstruction, as determined by Landlord in its sole discretion, judgment and opinion, or (b) the Premises shall be so damaged during the last two
(2) years of the Lease Term to the extent that more than fifty percent (50%) of the area thereof is rendered untenantable, as determined by Landlord in its sole discretion, judgment and
opinion, or (c) the holder of a mortgage, deed of trust or other lien covering the Premises at the time of the casualty elects, pursuant to such mortgage, deed of trust or other lien, to
require use of all or a part of Landlord's insurance proceeds in satisfaction of all or part of the indebtedness secured by the mortgage, deed of trust or other lien, then in any or all of the
instances referenced under subparagraphs 12(a), 12(b) and 12(c), Landlord may at its option elect to terminate this Lease within ninety (90) days after such damage by giving written notice
thereof to Tenant, in which event rent shall be abated effective as of the date of such damage. If, following any such casualty, Landlord does not terminate this Lease, or in the event of casualty
damage of a lesser extent to the Premises and/or Building, Landlord shall, following receipt of insurance proceeds, solely to the extent of such proceeds (after deducting therefrom the costs and
expenses paid or incurred by Landlord in connection with the recovery of such insurance proceeds), rebuild or repair the Premises and/or the Building to substantially the same condition in which
it/they were immediately prior to the happening of the fire or other casualty, except that Landlord shall not be required to rebuild, repair or replace any part of the furniture, equipment; fixtures
and other personal property which may have been placed by Tenant or other tenants within the Building or the Premises. Landlord shall allow Tenant a fair diminution of rental during the time the
Premises are unfit for occupancy, and at Landlord's option, the Lease Term shall be extended for a period equal to the period that the Premises are unfit for occupancy. 


        13.    Condemnation.    


        In
the event that (a) the Premises or the Building or any part thereof shall be taken for public use or condemned under eminent domain or conveyed under threat of such a taking or
condemnation to the extent that the remainder cannot be repaired, rebuilt or reconstituted within eighteen (18) months after the date of such condemnation or conveyance in lieu thereof, as
determined by Landlord in its sole discretion, judgment and opinion, or (b) the Premises shall be condemned or conveyed in lieu thereof during the last two (2) years of the Lease Term to
the extent that more than fifty percent (50%) of the area thereof, as determined by Landlord in its sole discretion, judgment and opinion, or (c) the holder of a mortgage, deed of trust or
other lien covering the Premises at the time of the condemnation or conveyance in lieu thereof occurs elects, pursuant to such mortgage, deed of trust or other lien, to require use of all or a part of
Landlord's condemnation proceeds or proceeds in connection with any conveyance in lieu of condemnation in satisfaction of all or part of the indebtedness secured by the mortgage, deed of trust or
other lien, then in any or all instances referenced under subparagraphs 13(a), 13(b) and 13(c), or if access to the Premises is precluded by any such event, Landlord may at its option elect to
terminate this entire Lease or only insofar as it affects the portion of the Premises taken, or the portion to which access is precluded, by giving notice to the Tenant within ninety (90) days
after the date on which title to the property taken vests in the condemnor. If this Lease is not terminated as to all of the Premises following any of said actual takings 


14







 



or
conveyances of any part of the Premises, then Landlord shall, to the extent of an equitable proportion of the award for the portion of the Premises taken (excluding any award for land and after
deducting therefrom the equitable portion of the costs and expenses paid or incurred by Landlord in connection with the recovery of such condemnation proceeds or proceeds from the conveyance in lieu
thereof), make such repairs to the Premises as are necessary to constitute a complete architectural and tenantable unit. In the event of a partial taking or conveyance of the Premises, Landlord shall
allow Tenant a fair diminution of rental. Tenant shall not be entitled to claim, or have paid to Tenant, any compensation or damages whatsoever for or on account of any taking or conveyance of any
right, interest or estate of Tenant under this Lease or otherwise to the extent that any such claim or compensation would adversely affect, preclude, reduce or diminish any claims, compensation and/or
damages which Landlord could otherwise recover, and Tenant hereby relinquishes and assigns to Landlord any rights to any such compensation or damages. Tenant does not hereby waive or release claims
for moving expenses, inconvenience or business interruption related to a condemnation of the Premises, but any such claim shall be asserted, if at all, in a proceeding independent of Landlord's
primary condemnation suit. 


        14.    Default and Remedies.    



        (a)    Events of Default.    The following events shall be deemed to be events of default (the
"events of default") by Tenant under this Lease: (i) Tenant shall fail to pay within five (5) days of the due date Basic Rental,
Additional Rental or any other rental or sums payable by Tenant hereunder; (ii) Tenant shall fail to comply with or observe any other provision of this Lease (including, but not limited to, the
rules and regulations referenced in Paragraph 18(c) below) and such failure shall continue for ten (10) days after written notice to
Tenant (or, in the case of Tenant's failure to comply with or observe
any other single provision of this Lease more than three (3) times during the Lease Term, upon the occurrence of the fourth and all subsequent such failures, without notice from Landlord);
(iii) Tenant or any guarantor of Tenant's obligations hereunder shall make a general assignment for the benefit of creditors; (iv) any petition shall be filed by or against Tenant or any
guarantor of Tenant's obligations hereunder under the United States Bankruptcy Code, as amended, or under any similar law or statute of the United States or any state thereof, and such petition shall
not be dismissed within forty-five (45) days of filing, or Tenant or any guarantor of Tenant's obligations hereunder shall be adjudged bankrupt or insolvent in proceedings filed
thereunder; (v) a receiver or trustee shall be appointed for all or substantially all of the assets of Tenant or any guarantor of Tenant's obligations hereunder, and such appointment shall not
be vacated or otherwise terminated, and the action in which such appointment was ordered dismissed, within forty-five (45) days of filing; (vi) Tenant
shall fail to take possession of or shall desert, abandon or vacate the Premises; (vii) the death or dissolution of any guarantor; or (viii) the occurrence of an
event described in clauses (iv) or (v) of this Paragraph 14(a) and the failure thereafter of Tenant (A) to timely and fully
make any payment of rent or any other sum of money due hereunder or (B) to timely and fully perform or observe any other covenant, condition or agreement to be performed or observed by it
hereunder. 


        (b)    Remedies.    Upon the occurrence of any event of default specified in this Lease, Landlord shall have the
option to pursue any one or more of the following remedies without any notice or demand whatsoever and without releasing either Tenant or any guarantor of Tenant's obligations hereunder from any
obligation under this Lease: 




        (i)    Landlord
may enter the Premises without terminating this Lease and perform any covenant or agreement or cure any condition creating or giving rise to an event of default
under this Lease and Tenant shall pay to Landlord on demand, as additional rent, the amount expended by Landlord in performing such covenants or agreements or satisfying or observing such condition.
Landlord or its agents or employees shall have the right to enter the Premises, and such entry arid such performance shall not terminate this Lease or constitute an eviction of Tenant. 




15







 


        (ii)   Landlord
may terminate this Lease by written notice to Tenant (and not otherwise) or Landlord may terminate Tenant's right of possession without terminating this Lease.
In either of such events, Tenant shall surrender possession of and vacate the Premises immediately and deliver possession thereof to Landlord, and Tenant hereby grants to Landlord full and free
license to enter the Premises, in whole or in part, with or without process of law and to expel or remove Tenant and any other person, firm, corporation or other entity who may be occupying the
Premises or any part thereof and remove any and all property therefrom, using such lawful force as may be necessary. 


        (iii)  In
the event Landlord elects to re-enter or take possession of the Premises after Tenant's default, with or without terminating this Lease, Landlord may
change or pick locks or alter security devices and lock out, expel or remove Tenant and any other person who may be occupying all or any part of the Premises without being liable for any claim for
damages. Notwithstanding anything
to the contrary contained herein or in section 93.002 of the Texas Property Code as such may be amended, revised, replaced or supplemented from time to time, Landlord may exercise any and all
of its rights or remedies under this Lease following an event of default by Tenant without compliance with section 93.002 of the Texas Property Code as such may be amended, revised, replaced or
supplemented from time to time, the benefits of which are hereby expressly waived by Tenant. 


        (iv)  If
Landlord elects to re-enter or take possession of the Premises without terminating this Lease, then to the maximum extent permitted by applicable law,
Tenant shall be liable for and shall pay to Landlord all Basic Rental and any other amounts of money due to Landlord hereunder as of the date of such election. To the maximum extent permitted by
applicable law, Tenant shall also pay to Landlord all Basic Rental required to be paid by Tenant during the remainder of the Lease Term as such amounts become due, diminished by any net sums received
by Landlord, if any, through reletting the Premises during said period (after deducting all expenses incurred by Landlord in connection with any reletting of the Premises). Landlord is not obligated
to relet the Premises, and if no reletting occurs, Tenant shall be responsible for the full amounts due to the maximum extent permitted by applicable law. If Landlord elects to relet, Landlord shall
have the sole and unfettered right to relet all or any part of the Premises for such rent and upon such terms as shall be satisfactory to Landlord (including but not limited to the right to relet the
Premises for a term shorter or longer than that remaining under this Lease, the right to relet the Premises as a part of a larger area and the right to change the character or use made of the
Premises). Tenant shall not in any event be entitled to any sums collected in connection with a reletting of the Premises that exceed the amount of Basic Rental and other sums of money due hereunder.
Landlord shall not be required to wait until the expiration of the Lease Term in order to collect any such deficiencies, and shall have the right to file suit from time to time, on one or more
occasions, to collect the deficiencies then due. Any such suit shall not prejudice in any way the right of Landlord to bring similar actions for any subsequent deficiency or deficiencies. 


        (v)   Notwithstanding
any prior election by Landlord not to terminate this Lease, Landlord may at any time, including subsequent to any re-entry or taking of
possession of the Premises as allowed hereinabove, elect to terminate this Lease. Tenant shall be liable for and shall immediately pay to Landlord the amount of all Basic Rental and other sums of
money due under this Lease as may have accrued as of the date of termination. To the maximum extent permitted by applicable law, Tenant shall also immediately pay to Landlord, as agreed liquidated
damages, an amount of money equal to the Basic Rental and other amounts due for the remaining portion of the Lease Term (had such term not been terminated by Landlord prior to the expiration of the
Lease Term), less the fair rental value of the Premises for the residue of the Lease Term, both discounted to their present value based upon an interest rate 




16







 





of
eight percent (8%) per annum. In determining fair rental value to the maximum extent permitted by applicable law, Landlord shall be entitled to take into account the time and expenses necessary to
obtain a replacement tenant or tenants, including anticipated expenses hereinafter described relating to recovery, preparation and reletting of the Premises; provided, however, the parties hereto
stipulate and agree that the fair rental value shall never be deemed to exceed eighty-five percent (85%) of the Basic Rental provided for herein for said residual period. If Landlord
elects to relet the Premises, or any portion thereof, before presentation of proof of such liquidated damages, the amount of rent reserved upon such reletting shall be deemed prima facie evidence of
the fair rental value of the portion of the Premises so relet to the maximum extent permitted by applicable law. 


        (vi)  In
addition to any sum provided to be paid above, to the maximum extent permitted by applicable law, Tenant shall also be liable for and shall immediately pay to
Landlord all broker's fees incurred by Landlord in connection with any reletting of the whole or any part of the Premises, the costs of removing and storing Tenant's or any other occupant's property,
the cost of repairing, altering, remodeling, renovating or otherwise putting the Premises into a condition acceptable to a new tenant or tenants, the cost of changing locks, altering or rekey parking,
access or security devices and/or replacement of parking and/or access cards, the cost of removal and replacement of signage and all expenses incurred by Landlord in enforcing Landlord's remedies,
including reasonable attorneys' fees. 


        (vii) Landlord
may apply Tenant's Security Deposit to the extent necessary to make good any rent arrearage, to pay the cost.of remedying Tenant's default or to reimburse
Landlord for expenditures made or damages suffered as a consequence of Tenant's default. Following any such application of the Security Deposit, Tenant shall pay- to Landlord on, demand
the amount so applied in order to restore the Security Deposit to its original amount. 



        (viii) Nothing
contained in this Paragraph 14(b) shall be construed as imposing any enforceable duty upon Landlord to
relet the Premises or otherwise mitigate or minimize Landlord's damages by virtue of Tenant's default. Except to the extent otherwise required by applicable law, Landlord shall not be liable in any
manner, nor shall Tenant's obligations hereunder be diminished, by the failure of Landlord to relet the Premises, or in the, event of reletting, to collect rent. As a material inducement to cause
Landlord to enter into this Lease, Tenant expressly agrees that Landlord does not and shall not have any duty to Tenant to relet or attempt to relet the Premises and/or to mitigate or attempt to
mitigate Landlord's damages and Tenant expressly waives any rights to require Landlord to mitigate its damages
as permitted pursuant to Austin Hill Country Realty. Inc. v. Palisades Plaza. Inc., 948 S.W.2d 293 (Texas 1997). 





        (c)    Effect of Suit or Partial Collection.    Institution of a forcible detainer action to re-enter the
Premises shall-not be construed to be an election by Landlord to terminate this Lease. Landlord may collect and receive any rent due from Tenant and the payment thereof shall not
constitute a waiver of or affect any notice or demand given, suit instituted or judgment obtained by Landlord, or be held to waive or alter the rights or remedies which Landlord may have at law or in
equity or by virtue of this Lease at the time of such payment. 


        (d)    Remedies Cumulative.    All rights and remedies of Landlord herein or existing at law or in equity are
cumulative and the exercise of one or more rights or remedies shall not be taken to exclude or waive the right to the exercise of any other. 


        15.    Surrender of Premises.    



        (a)    Surrender.    Upon the expiration or termination of this Lease, Tenant shall peaceably surrender to Landlord
(i) the Premises, including the alterations, improvements and changes (except as 


17







 



provided
in Paragraph 15(b)) other than Tenant's fixtures remaining "the property of Tenant as provided in Paragraph 15(b), broom-clean
and in the condition the same were in on the Commencement Date, subject only to damage caused by fire or other casualty not caused by the willful act or omission of Tenant or Tenant's agents,
contractors, subcontractors or employees, or ordinary use and wear, and (ii) all keys, parking, access and/or security cards, devices or other security identification previously delivered to
Tenant with respect to the Building, Project and/or Premises. 


        (b)    Removal of Alterations and Tenant's Property.    




        (i)    Notwithstanding
anything in this Lease to the contrary, all permanent or built-in fixtures or improvements and all mechanical, electrical and plumbing
equipment in the Premises, solely whether installed by Tenant or by Landlord after the initial commencement date,
shall be the property of Landlord upon the termination of this Lease, unless Landlord, by notice to Tenant no later than twenty (20) days prior to the expiration of the Lease Term (or any
renewal or extension thereof), elects to relinquish Landlord's right to any such fixtures or improvements and to have them removed from the Premises by Tenant within five (5) business days
after the expiration of this Lease, at Tenant's sole cost and expense. Except as otherwise provided, all furnishings, equipment, furniture, trade fixtures and other removable equipment installed in
the Premises by Tenant and paid for by Tenant shall remain the property of Tenant and shall be removed by Tenant -upon the termination of this Lease. Tenant shall repair any damage caused
by such removal. 


        (ii)   If
any furnishings, equipment, furniture, trade fixtures or other removable equipment are not removed within five (5) business days after the expiration of this
Lease, then Tenant hereby grants to Landlord the option, exercisable at any time thereafter without the requirement of any notice to Tenant, (A) to treat such property, or any portion thereof,
as being abandoned by Tenant to Landlord, whereupon Landlord shall be deemed to have full rights of ownership thereof; (B) to elect to remove and store such property, or any portion thereof, on
Tenant's behalf (but without assuming any liability to any person including, but not limited to, Tenant) and at Tenant's sole cost and expense, with reimbursement therefor to be made to Landlord upon
demand; and/or (C) to sell, give away, donate or dispose of as trash or refuse any or all of such property without any responsibility to deliver to Tenant any proceeds therefrom. If
(a) Landlord elects not to exercise its contractual and/or statutory lien rights covering Tenant's property as may be granted herein, (b) Tenant ceases to occupy the Premises, or its
rights to occupy the Premises are terminated by Landlord prior to Landlord's termination or the expiration of this Lease and (c) any of Tenant's furnishings, equipment, furniture, trade
fixtures or other removable equipment are not removed within five (5) business days thereafter, then Tenant hereby grants to Landlord the option, exercisable at any time thereafter without the
requirement of notice to Tenant, (i) to treat such property, or any portion thereof, as being abandoned by Tenant to Landlord, whereupon Landlord shall be deemed to have full rights of
ownership thereof; (ii) to elect to remove and store such property, or any portion thereof, on Tenant's behalf (but without assuming any liability to any person including, but not limited to
Tenant) and at Tenant's sole cost and expense, with reimbursement therefor to be made to Landlord upon demand; and/or (iii) to sell, give away, donate or dispose of as trash or refuse any or
all of such property without responsibility to deliver to Tenant any proceeds therefrom. Landlord chart have no liability of any kind whatsoever to Tenant in respect of the exercise or failure to
exercise the options set forth in this Paragraph 15(b). Specifically, Tenant shall not have the right to assert against Landlord a claim either
for the value, or the use, of any such property, either as an offset against any amount of money owing to Landlord or otherwise. The provisions of this  Paragraph 15(b) shall supersede the
provisions of section 93.002(d) and (e) of the Texas Property Code, as such may be amended,
revised, replaced or supplemented, from time to time, and any other law which purports to restrict the options granted to Landlord herein. 




18







 







        16.    Holding Over.    


        Should
Tenant continue to hold the Premises after the termination of this Lease, whether the termination occurs by lapse of time or otherwise, such holding over shall, unless otherwise
agreed by Landlord in writing, constitute and be construed as a tenancy from month to month only and at a monthly rental rate equal to one and on half
(11/2) times two (2) times the aggregate amount (sum) of (a) the monthly Basic Rental plus (b) any
Additional Rental payable during the last month prior to the termination of this Lease to be paid to Landlord on the first day of the holdover period and upon and subject to all of the other terms,
provisions, covenants and agreements set forth herein except the right, if any, to renew this Lease. The inclusion of the preceding sentence shall not be construed as Landlord's consent for the Tenant
to holdover. Tenant shall be liable for any and all damages, losses, costs and expenses (including without limitation consequential damages) paid, suffered or incurred by Landlord as a result of
Tenant's holding over. Notwithstanding anything to the contrary contained or
implied elsewhere herein, Landlord may terminate any such holdover tenancy upon ten (10) days written notice by Landlord to Tenant. 


        17.    Mortgages.    


        This
Lease shall be subordinate to all deeds of trust now or hereafter encumbering the Building, and all refinancings, replacements, renewals, modifications, extensions or consolidations
thereof. Tenant agrees to attorn to any mortgagee, trustee under a deed of trust or purchaser at a foreclosure sale or trustees sale as Landlord under this Lease. Tenant covenants and agrees that
Tenant shall within five (5) days after Landlord's request execute in recordable form and deliver to Landlord whatever instruments may be required by any such mortgagee, trustee or purchaser to
acknowledge and further evidence the subordination of this Lease and/or the attornment by Tenant to such mortgagee, trustee or purchaser. If Tenant within five (5) business days after
submission of any such instrument fails to execute the same, Landlord is hereby authorized to execute the same as attorney-in-fact. for Tenant. Any holder of a deed of trust
covering all or any part of the Building may at any time elect to have this, Lease have priority over its deed of trust by unilaterally executing an.instrument' of subordination or placing a clause of
such subordination in any pleadings or in its deed of trust or any amendment or supplement thereto and recording the same. 


        18.    Certain Rights Reserved by Landlord.    


        Landlord
hereby expressly reserves, retains and shall have the following rights: 


        (a)    Common and Service Area Alterations.    To decorate and to make repairs, alterations, additions, changes or
improvements, whether structural or otherwise, in, about or on the exterior of the Building, or any part thereof, and to change, alter, relocate, remove or replace service areas and/or common areas;
to place, inspect, repair and replace in the Premises (below floors, above ceilings or next to column9 utility lines, pipes and the like to serve the Premises and/or other areas of the Building
outside the Premises; and to otherwise alter or modify the Project, and for such purposes to enter upon the Premises and, during the continuance of any such work, to -take such measures
for safety or for the expediting of such work as may be required, in Landlord's judgment, all without affecting any of Tenant's obligations hereunder, provided Landlord's entries in the Premises shall
be subject to the terms of Paragraph 19(1). 


19









   
        (b)    Parking.    To permit Tenant and its employees to use the parking garage associated with the Building (if
applicable) and the surface parking area adjacent thereto (if any) only in accordance with the terms and provisions of this Lease and with rules and regulations  reasonably promulgated from time to time
by Landlord and/or the operator of the garage at such charges as then may be in
effect, and to prohibit Tenant and its employees to use any on-site surface parking spaces within the Project designated for visitors, occupants of the Building, or
otherwise. Parking spaces will be unassigned, provided that Landlord may at any time assign parking spaces. Tenant shall, if requested by Landlord, furnish to Landlord a complete list of the license
plate numbers of all vehicles operated by Tenant and Tenant's employees and agents. Landlord shell not be liable for any damage of any nature whatsoever to, or any theft of, vehicles, or contents
therein, in or about such parking facility. 


        (c)    Rules and Regulations.    To establish and amend from time to time  reasonable rules and regulations governing all tenants'
use and occupancy of the Building and/or the Project (including, but not limited to, the parking
garage), provided that in the event of a conflict between those rules and regulations and this Lease, this Lease s gall control. The rules and regulations enforced by Landlord as of the date of
execution of this Lease are attached hereto as Exhibit "B" and a current copy of the Rules and Regulations thereafter in effect from
time-to-time is available upon request. 


        (d)    Food Preparation.    To prohibit the preparation of food within the Premises for commercial purposes or the
placing of vending or dispensing machines of any kind in or about the Premises if such vending or dispensing machines are available to the general public. 



        (e)    Security Measures.    To take all such reasonable measures as Landlord may deem advisable for the security of
the Building and its occupants. Landlord, however, shall have no liability to Tenant or its employees, agents, invitees or licensees for losses due to theft or burglary, or for damage done by
unauthorized persons in or about the Building, Premises or Project. Landlord may require those tenants requesting access to the Building during other than normal business hours to
pay its then prevailing fee for each magnetic access and/or security card or device which Landlord supplies to Tenant for after hours access to the Building. Tenant shall cooperate
fully in Landlord's efforts to maintain security in the Building and shall follow all regulations promulgated by Landlord with respect thereto. 


        (f)    Right To Relocate Tenant.    At any time after the execution of this Lease and on sixty (60) days prior
written notice, Landlord may substitute for the Premises other premises in the Building (the "New Premises"), in which event the New Premises shall be
deemed to be the Premises for all purposes hereunder, provided: (a) the New Premises shall be similar in area, finish and appropriateness for the Permitted Use and will
be located on the ninth floor or above: (b) the Basic Rental and other rentals
payable under this Lease shall remain the same; and (c) reasonable out-of-pocket costs in connection with relocation to the New Premises shall be reimbursed by Landlord
to Tenant after receipt of third party invoices therefor. 


        19.    Miscellaneous.    


        (a)    Time Is of the Essence.    The time of the performance of each and all of the covenants, conditions and
agreements of this Lease is/are of the essence of this Lease. 



        (b)    Force Majeure.    If either Landlord or Tenant is prevented or hindered from timely satisfying any provisions
set forth herein because of a shortage of or inability to obtain materials or equipment, strikes or other labor difficulties, governmental restrictions, casualties, Y2K
events or circumstances or any other cause beyond such party's reasonable control, such party shall be permitted an extension of time of performance by the number of days during
which such performance was prevented or hindered; provided, however, that this paragraph shall not apply to the payment of rent or other monies.by Landlord or Tenant, nor shall the provisions of this
paragraph postpone the date that rent is payable pursuant to this Lease, except as expressly provided to the contrary in Paragraph 4. 


20







 



        (c)    No Personal Liability of Landlord:    If Landlord shall fail to perform any covenant, term or condition of this
Lease and, as a consequence, if Tenant shall recover a money judgment against Landlord, such judgment shall be satisfied only out of the proceeds received at a judicial sale upon execution and levy
against the right, title and interest of Landlord in the Building and in the rents or other income from the Building receivable by Landlord, and neither Landlord nor Landlord's owners, partners or
venturers shall have any personal, corporate or other liability hereunder. Landlord shall have the right to transfer, assign and convey, in. whole or in part, the Building and any and all of its
rights under this Lease, and in such event, Landlord shall thereby be released from any further obligations hereunder, and Tenant agrees to look solely to such
successor-in-interest of Landlord for performance of such obligations. 


        (d)    Quiet Enjoyment.    Landlord hereby covenants and agrees that if Tenant shall perform all of the covenants and
agreements herein stipulated to be performed on Tenant's part, Tenant shall at all times during the continuance hereof have peaceable and quiet enjoyment and possession of the Premises without
hindrance from Landlord or any person or persons lawfully claiming the Premises by, through or under Landlord, subject, however, to the terms of this Lease and to all mortgages, deeds of trust, leases
and agreements to which this Lease is subordinate. 


        (e)    Entire Agreement and Amendments.    This Lease is the only agreement between the parties hereto and their
representatives and agents. There are no representations or warranties between the parties other
than the representations and agreements contained in this document. No agreement shall be effective to change, modify or terminate this Lease in whole or in part unless such agreement is in writing
and duly signed by the party against whom enforcement of such change, modification or termination is sought. 


        (f)    Interpretation, Applicable Law, Exclusive Venue and Service of Process.    The necessary grammatical changes
required to make the provisions of this Lease apply in the plural sense where there is more than one Tenant and to either corporations, associations, partnerships, other legal entities or individuals,
male or female, shall in all instances be assumed as though in each case fully expressed. The laws of the State of Texas shall govern the validity, interpretation, performance and enforcement of this
Lease. The exclusive venue for any legal proceeding brought by any party to this Lease against the other or against any guarantor of this Lease or by any guarantor of this Lease against any party to
this Lease shall be in Dallas County, Texas. If this Lease is executed by more than one person or entity as "Tenant," each such person or entity executing this Lease as Tenant shall be jointly and
severally bound and liable hereunder. Tenant and each guarantor of this Lease hereby agrees and consents that, in addition to any methods of service or process provided for under applicable law, all
service of process to Tenant or any such guarantor in any such suit, action or proceeding in any Texas state court or any United States federal court, sitting in the County of Dallas, Texas may be
made by certified or registered mail, postage prepaid, return receipt requested, directed to Tenant at its address stated in Paragraph 19(m), or
at a subsequent address for Tenant of which Landlord actually received notice from Tenant in accordance with the terms and provisions of  Paragraph 19(m) and directed to any such guarantor at its
address stated in any written guaranty agreement (or to the address to which notices
are then to be delivered to Tenant if Landlord does not at such time have a record of any address to which notices are to be sent to such guarantor) or at a subsequent address for such guarantor of
which Landlord actually received notice from such guarantor in accordance with the terms and provisions of any applicable guaranty agreement or, in the absence thereof; in accordance with the terms
and provisions of Paragraph 19(m). Notwithstanding anything to the contrary contained elsewhere herein or in any such guaranty agreement, any
service of process so made shall be deemed completed and served five (5) days after the same shall have been mailed as aforesaid. 


        (g)    Severability.    No provision of this Lease shall be construed or interpreted in any manner which would render
such provision invalid, illegal or unenforceable. If any provision of this Lease is 


21







 



held
to be invalid, illegal or unenforceable, such invalid, illegal or unenforceable provision shall be deemed to be severable from and shall not affect the validity of the remainder of this Lease. 


        (h)    Terms Binding.    Subject to the limitations on subletting and assignment set forth in this Lease, all
covenants, promises, conditions, representations and agreements herein contained shall be binding upon and apply and inure to the benefit of the parties hereto and their respective heirs, executors,
administrators, successors and assigns. 


        (i)    Estoppel Certificates.    Within five (5) days after request by Landlord, Tenant agrees to execute and
deliver to Landlord estoppel or offset letters as required by Landlord or by Landlord's lender(s). The letters shall certify the date of this Lease and any amendments, that Landlord is not in default
of any of the terms and provisions of this Lease or specifying the provisions as to which Landlord is in default if Landlord shall be in default, that Landlord has performed all inducements required
of Landlord in connection with this Lease, including any construction obligations, specifying any inducements which have not been fulfilled by Landlord, the date to which rent has been paid, and any
other matters which Landlord or its lender(s) may reasonably require. Tenant farther agrees to furnish to Landlord from time to time when requested by Landlord a letter of acceptance in conformity
with any requirements made by any existing or proposed lender(s). 


        (j)    Late Payment Charge and Interest Payable.    Landlord may impose a late payment charge equal to five percent
(5%) of any amount due if not paid within five (5) days from the date required to be paid hereunder. In addition, any payment due under this Lease not paid within ten (10) days after the
date herein specified to be paid shall bear interest from the date such payment is due to the date of actual payment at the rate of eighteen percent (18%) per annum or the highest lawful rate of
interest permitted by Texas or federal law, whichever rate of interest is lower. Finally, Tenant shall also immediately pay to Landlord without demand a fee of Twenty-Five and No/100
Dollars ($25.00) to help defray the additional cost of handling and accounting with respect to each payment which is tendered to Landlord by or on Tenant's behalf and which payment is dishonored for
any reason by the maker's financial institution. The $25.00 fee is, however, expressly subject to change during the Lease Term and any renewal or extension thereof upon ten (10) days prior
written notice thereof by Landlord to Tenant. Further, Tenant expressly agrees upon notice thereof from Landlord (at Landlord's sole option) to pay all future obligations of Tenant to Landlord
hereunder including, but not limited to, any rental due hereunder) by certified or cashier's check or prepaid money order following the dishonor of two (2) of Tenant's tendered payments. 



        (k)    Security Deposit.    Landlord shall hold Tenant's Security Deposit without interest, and the same shall not be
considered prepaid rent or a measure of Landlord's damages in case of default by Tenant. The remaining balance of the Security Deposit (after application of any part thereof in accordance with  Paragraph 14(b)
 or for necessary repairs to the Premises), if any, shall be refundable to Tenant within thirty (30) days after termination
of this Lease; provided, however, in the event that any obligations of Tenant have not yet been fully paid, performed and discharged (whether by virtue of not yet being actually calculated, known,
liquidated or performable, such as the final calculation of Additional Rental for Tenant's proportionate share of the Actual Operating Expenses in excess of the Operating Expense Stop for the year in
which the Lease terminates, or otherwise), then the remaining balance of the Security Deposit, if any, shall be refundable to Tenant within thirty (30) days after all such obligations of Tenant
have been fully paid, performed, and discharged. 


        (l)    Access to Premises.    Tenant agrees that Landlord and its agents may enter the Premises for the purpose of
inspecting and making such repairs (structural or otherwise), additions, improvements, changes or alterations to the Premises or the Building as may be permitted or required under this Lease or as
Landlord may elect, and to exhibit the same to prospective purchasers, mortgagees or tenants. In the event of any such repairs, additions, improvements, changes or alterations, Tenant shall cooperate
with Landlord to facilitate Landlord's efforts. Landlord's entries in the Premises shall be 


22







 



preceded
by reasonable notice (except in the case of an emergency) and shall interfere with Tenant's use and occupancy of the Premises for the Permitted Use only to the extent reasonably necessary to
effectuate such purposes. 


        (m)    Notices.    Notices hereunder must be hand-delivered or sent by registered or certified mail,
return receipt requested, postage prepaid, addressed, if to Landlord, at 5151 Belt Line Road, Suite 650, Dallas, Texas 75254, Attention: Building Manager, with a copy to Prestonwood
Tower, Inc., 315 Central Park West, Suite 1200, New York, New York 10025, Attention: Sinclair Haberman and if to Tenant, at the address specified for Tenant in  Paragraph 1(a) above prior to
the Commencement Date and to the Premises thereafter, or to such other address as may be specified by written
notice actually received by Landlord. Except to the extent actual receipt of notice is required pursuant to the terms and provisions of  Paragraph 19(v) below, all notices (including, but not
limited to, any copies), shall be deemed given upon tender of delivery (in the case of a
hand-delivered notice) or upon the first attempted delivery by United States Postal Service (in the case of a registered or certified letter), provided that no notice of either party's
change of address shall be effective until fifteen (15) days after the addressee's actual receipt thereof. 


        (n)    Acceptance of Premises and Building by Tenant.    LANDLORD HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED
REPRESENTATION OR WARRANTY THAT THE PREMISES ARE SUITABLE FOR TENANT'S INTENDED PURPOSE OR USE. THE TAKING OF POSSESSION BY TENANT SHALL BE CONCLUSIVE EVIDENCE THAT TENANT: 




        (i)    ACCEPTS
THE PREMISES AS SUITABLE FOR THE PURPOSES FOR WHICH THEY WERE LEASED; 


        (ii)   ACCEPTS
THE BUILDING AND PROJECT AND EVERY PART AND APPURTENANCE THEREOF AS BEING IN GOOD AND SATISFACTORY CONDITION; AND 


        (iii)  WAIVES
ANY DEFECTS IN THE PREMISES, BUILDING AND PROJECT AND ITS AND THEIR APPURTENANCES EXISTING NOW OR IN THE FUTURE, EXCEPT THAT TENANT'S TAKING OF POSSESSION SHALL
NOT BE DEEMED TO WAIVE LANDLORD'S COMPLETION OF MINOR FINISH WORK ITEMS WITH REGARD TO THE PREMISES THAT DO NOT INTERFERE WITH TENANTS OCCUPANCY OF THE PREMISES. 





        TENANT
ACKNOWLEDGES THE DISCLAIMER BY LANDLORD SET FORTH HEREIN AND WAIVES ALL CLAIMS BASED ON ANY IMPLIED WARRANTY OF SUITABILITY. FURTHERMORE, TENANT CONFIRMS THAT ITS OBLIGATIONS TO
PAY BASIC RENTAL, ADDITIONAL RENTAL AND OTHER AMOUNTS OF MONEY DUE TO LANDLORD HEREUNDER ARE NOT DEPENDENT ON THE CONDITION OF THE PREMISES, THE BUILDING AND/OR THE PROJECT, THE COMPLETION OF ANY
MINOR FINISH WORK ITEMS OR THE PERFORMANCE BY LANDLORD OF ITS OBLIGATIONS HEREUNDER. TENANT SHALL CONTINUE TO PAY BASIC RENTAL, ADDITIONAL RENTAL AND OTHER AMOUNTS OF MONEY DUE TO LANDLORD HEREUNDER,
WITHOUT ABATEMENT, SETOFF OR DEDUCTION, NOTWITHSTANDING ANY BREACH OR ALLEGED BREACH BY LANDLORD OF ITS OBLIGATIONS HEREUNDER. NOTHING CONTAINED HEREIN SHALL BE CONSTRUED TO
DIMINISH THE OBLIGATIONS OF LANDLORD THAT ARE EXPRESSLY SET FORTH ELSEWHERE IN THIS LEASE.


        (o)    Building Name.    Landlord shall have the exclusive right at all times during the Lease Term to change, modify,
add to or otherwise alter the name of the Building, and Landlord shall not be liable for claims or damages of any kind which may be attributed thereto or result therefrom. 


23







 



        (p)    Landlord's
Lien.    In addition to the statutory landlord's lien, Landlord
shall have (and Tenant hereby expressly grants to Landlord) at all times an express contractual Landlord's lien and a valid security interest in and to all of the rights, titles, liens and interests
which may be granted to a secured party under the Uniform Commercial Code in force in the State of Texas to secure payment of all rentals and other sums of money becoming due hereunder form Tenant,
and to secure payment of any damage or loss which Landlord may suffer by reason of the breach by Tenant of any covenant, agreement or condition contained herein, upon all goods, wares, equipment,
fixtures, furniture, improvements, contract rights, general intangibles, and other personal property of Tenant presently or which may hereafter be situated in the Premises and all proceeds therefrom,
and such property shall not be removed therefrom without the written consent of Landlord until all arrearages in rent as well as any and all other sums of money then due to Landlord hereunder shall
first have been paid and discharged an all the covenants, agreements and conditions hereof have been fully complied with and performed by Tenant. Upon the occurrence of an event of default by Tenant,
Landlord may, in addition to any other remedies provided herein, or at law or in equity, enter upon the Premises and take possession of any and all goods, wares, equipment, fixtures, furniture,
improvements and other personal property of Tenant situated in the Premises, without liability for trespass or conversion, and sell the same at one or more public or private sale or sales with or
without having such property at the sale or sales after giving Tenant reasonable notice of the time and place of any public sale or of the time after which any private sale is to made, at which
sale(s) Landlord or its assigns may purchase unless otherwise prohibited by law. Unless otherwise provided by law, and without intending to exclude any other manner of giving Tenant reasonable notice,
the requirement of reasonable notice shall be met if such notice is given at least five (5) days before the time of sale. Such notice shall be deemed to be delivered if personally delivered or
when deposited in the United States mail; postage prepaid, certified or registered mail (with or without return receipt requested), addressed to the parties hereto at the address as shown herein,
whether or not actually received. The proceeds from any such disposition, less
any and all expenses connected with the taking of possession, holding and selling of the property (including reasonable attorney's fees and other expenses), shall be applied as a credit against the
indebtedness secured by the security interest granted in this paragraph. Any surplus shall be paid to Tenant or as otherwise required by law; and Tenant shall pay any deficiencies to Landlord
immediately upon demand. Upon request by Landlord, Tenant agrees to periodically execute and deliver to Landlord from time-to-time one or more financing statements in form
sufficient to perfect the security interest of Landlord in the aforementioned property and proceeds thereof under the provisions of the Uniform Commercial Code in force in the State of Texas. The
statutory lien for rent is not hereby waived, the security interest herein granted being in addition and supplementary thereto. Landlord shall be entitled to file a carbon, photographic or
other reproduction of this Lease as a financing statement as is permitted under section 9.402(a) of the Texas Business and Commerce Code as the same may be amended, revised, replaced or
supplemented from time to time. 


        (q)    Authority To Sign Lease.    If Tenant is a corporation or a partnership (general or limited), or any other
legal entity, each person(s) signing this Lease as an officer or partner or other authorized signatory of Tenant represents to Landlord that such person(s) is authorized to execute this Lease without
the necessity of obtaining any other signature of any other officer or partner, or other person or entity, that the execution of this Lease has been authorized by the board of directors of the
corporation or by the partners of the partnership, or by the other parties or persons authorized to do so on behalf of such other entity, as the case may be, and that this Lease is fully binding on,
and enforceable against, Tenant. Landlord reserves the right to request evidence of the approval of this Lease and authorization of Tenant's signatories to bind Tenant, which evidence shall be
satisfactory in form and content to Landlord and its counsel. 



        (r)    Attorneys' Fees, Costs and Expenses.    In the event either party is in default beyond any applicable grace
and/or notice and opportunity to cure period in the performance of any of the terms of this Lease and the other party employs an attorney in connection therewith, the non-prevailing party 


24







 



agrees
to pay the prevailing party's reasonable attorneys' fees and costs of suit. Whenever any request or action by Tenant reasonably causes Landlord to engage an attorney (including an
in-house attorney of Landlord or any of its affiliates) or incur any other costs or expenses, Tenant agrees that it shall pay or reimburse Landlord for such costs and expenses upon demand. 


        (s)    Execution of Lease.    The submission of this Lease for examination does not constitute a reservation of or
option for the Premises or any other space within the Building and shall vest no right in either party. This Lease shall become effective only upon the full execution and delivery hereof by all of the
parties hereto. 


        (t)    No Attornment.    All checks tendered to Landlord as and for the Basic Rental and/or Additional Rental or any
other payments required hereunder shall be deemed payments for the account of Tenant. Acceptance by Landlord of Basic Rental and/or Additional Rental and/or any other payments from
anyone other than Tenant shall not be deemed to operate as an attornment to Landlord by the payor of such Basic Rental and/or Additional Rental and/or any other payments or as a consent by Landlord to
an assignment of this Lease, or subletting by Tenant of the Premises or any portion thereof to such payor, or as a modification of any of the provisions of this Lease. 


        (u)    Arms-Length Transaction.    This Lease has been entered into by the undersigned after
arms-length negotiation, with each party acknowledging that it and its counsel, if it so chooses, have had an opportunity to review and negotiate the terms and provisions of this Lease,
and therefore, the parties agree that this Lease shall not be construed against Landlord on the ground that Landlord's representatives prepared this Lease. 


        (v)    Confidentiality.    Notwithstanding anything to the contrary contained elsewhere herein, Tenant hereby
acknowledges any and all information regarding this Lease and the terms and provisions hereof (including, but not limited to, those relating to the Term, Basic Rental, Additional Rental, Security
Deposit, Operating Expense Stop, renewal rights and/or Finish Work obligations) shall be treated as confidential information and further, that if any such confidential information is disclosed to
third parties, Landlord may suffer damages and irreparable harm. In connection therewith, Tenant hereby expressly understands, acknowledges and agrees (i) Tenant shall not disclose any of the
terms and provisions of this Lease (as the same may hereafter be amended), to any party other: than the landlord, Landlord's attorneys, investors, agents or representatives, or Tenant's agents,
representatives, attorneys, consultants or potential institutional lenders, and other than as required by applicable law or process of law, without the prior express written consent of Landlord (which
consent shall not be unreasonably withheld or delayed); and (ii) that Landlord is relying on Tenant's covenant not to disclose any of the contents or information contained in the Lease to any
party other than as expressly provided elsewhere herein (all of which is deemed to be confidential information by the provisions hereof). Tenant hereby indemnifies and agrees to hold Landlord harmless
of from and against any and all loss, cost, expense, damage or liability (including, but not limited to, reasonable attorneys' fees and costs of suit) arising out of or related to Tenant's breach of
said confidentiality requirement. Tenant further agrees that, in the event of any breach or Threatened breach by Tenant, Landlord may avail itself of any remedy available at law or in equity
including, but not limited to, obtaining injunctive relief. The foregoing covenants and indemnity shall expressly survive the expiration or earlier termination of this Lease. 


        (w)    Notice and Cure.    In the event of any act or omission by Landlord which would give Tenant the right to seek
or obtain damages from Landlord or the right to terminate this Lease by reason of a constructive or actual eviction from all or part of the Premises or otherwise, Tenant shall not sue for such damages
or exercise any such right to terminate unless and until Tenant shall have first given written notice of such act or omission to Landlord and to the holder(s) of the indebtedness or other obligations
secured by any mortgage or deed of trust affecting the Premises (if previously identified by name and mailing address to Tenant in writing), and a reasonable period of time [not less than
thirty (30) days] for commencing to remedy such act or omission shall have elapsed following the actual 


25







 



receipt
of such notice, during which, time Landlord and such holder(s), or any of them, their agents or employees, shall be entitled to enter upon the Premises and do therein whatever may be necessary
to remedy such act or omission. During the period after the actual receipt of such notice and during the remedying of such act or omission, the Basic Rental payable by Tenant for such period as
provided in this Lease shall be abated and apportioned only to the extent that any part of the Premises shall be untenantable. 


        (x)    Limitation of Tenant'sTime to Sue.    



        Commencement of Action.    Notwithstanding anything to the contrary contained or implied elsewhere herein, to the extent
permitted by applicable law, any claim, demand, action, cause of action, right or defense by Landlord or Tenant which arises out of or is related to
this Lease shall be barred and may not be made, filed, brought, interposed or prosecuted unless Landlord or Tenant commences an action thereon or
interposes a defense by reason thereof, within six (6) twelve (12) months after the date of the action,
inaction, omission or event that gave rise to such claim, demand, action, cause of action, right or defense (time being expressly of the essence). 




        (ii)   Tenant
Acknowledgment. Landlord and Tenant expressly understands and
acknowledges, after having consulted with legal counsel of Tenant'stheir choice, that the purpose and effect of  Paragraph 19(w) is to
substantially shorten the time period within which Tenant would otherwise have to raise such claims, demands, actions,
causes of action, rights or defenses. 





        (y)    Exhibits and Riders.    The following exhibits and riders are attached hereto, incorporated herein and made a
part of this Lease for all purposes: 



	Exhibit "A-1":	Floor Plan of Premises
	Exhibit "A-2":	Property Description
	Exhibit "A-3":	Refusal Space
	Exhibit "B":	Rules and Regulations
	

Rider I:	

Renewal Option
	Rider II:	Right of Refusal






        20.    Special Provisions.    Landlord shall allow Tenant to install a satellite dish not to
exceed 24 inches in diameter on the roof at no charge to Tenant throughout the term of the Lease. Before installation, Tenant shall submit drawings to Landlord showing location, size and scope of work
to be completed for approval prior to beginning construction.


26







 



        IN
WITNESS WHEREOF, the parties hereto have executed and delivered this Lease as of the day and year first above written. 



	 	 	LANDLORD:

PRESTONWOOD TOWER, LTD.

By PRESTONWOOD TOWER-DALLAS, CORP.,

Its General Partner
	

 	
 	

By:	

/s/  SINCLAIR HABERMAN      
 Sinclair Haberman, Secretary
	

 	
 	

TENANT:

SYGENCE, L.L.C.
	

 	
 	

By:	

GEORGE S. NOGA
 George S. Noga, President and CEO




27








  



 
 

"RIDER I"    
    
    RENEWAL OPTION    
    



        Tenant shall have one (1) option to renew the term of the Lease for a period of five (5) years ("Renewal Term"). The annual base rental rate per
rentable square foot of the leased premises shall be determined based solely upon the greater of (i) market rental rate or (ii) the total gross rental rate (base rent plus escalation)
being paid by Tenant at the time when the Renewal Term commences. If Tenant desires to exercise the Renewal Term, it shall advise Landlord in writing by registered mail, postage prepaid, return
receipt requested, at the address of Landlord set forth. In Paragraph 18 (m) hereof, at least six (6) months prior to the expiration of the original term of this Lease. If the
parties hereto are unable to agree in writing as to the base rental rate for the Renewal Term within ninety (90) days after the exercise of this Renewal Option, then this Lease shall end. on
the expiry of the term and this Renewal Option shall be null and void. 


28







 
 
 

"RIDER II"    
    
    RIGHT OF REFUSAL    
    


SUITE 1120  


        As long as this Lease is in full force and effect without default by Tenant, Landlord agrees subject to any preexisting rights of refusal, that prior to leasing
to a third party any part of the Right of Refusal Area designated on Exhibit A-3 attached hereto (the "Refusal Space"), Landlord will
submit to Tenant a copy of the proposed lease terms which such third party is willing to offer and Landlord is willing to accept from the third party (the "Lease Terms") On or before the fifth
business day after the date of receipt of such submission,, if Tenant duly and timely exercises the Refusal Right, Landlord and Tenant will promptly (and in any event within five (5) business
days after Landlord's receipt of Tenant's notice) enter into a lease for the Refusal Space (the "New Lease) containing the Lease Terms. If for any reason Tenant fails duly and timely to exercise the
Refusal Right, or if Tenant properly exercises the Refusal Right, but thereafter for any reason (except Landlord's sole fault) does not timely enter into the New Lease; Landlord will be free to rent
the Refusal Space to any third party on terms and conditions similar to the Lease Terms. If the proposed terms are not similar to the Lease Terms, Landlord shall resubmit the altered terms to Tenant
according to the preceding process. In such event, the Refusal Right and Landlords obligations rimier this paragraph shall be null and void and without further force and effect throughout the
remainder of the term of this Lease and any extension hereof 


29










	 	 	  PRESTONWOOD  
 T  O  W  E  R	 	 





August 13,
2004 


Mr. Paul
Gregory

5151 Beltline Road, Suite 1100

Dallas, Texas 75254 


Dear
Paul: 


        This
letter is in reference to the Office Lease dated Time 28, 2004, by and between Prestonwood Tower, Ltd., a Texas corporation, as "Landlord", and Syngence, L.L.C., as "Tenant"
at Prestonwood Tower in Dallas, Texas. 


        Landlord
and Tenant have agreed that the commencement date of the lease shall be August 16, 2004 and the lease shall expire on August 31, 2009. 


        Listed
below is the current rental due for this lease: 



	 
	 	August 16, 2004 - April 30, 2005
	 	May 1, 2005

	Basic Rental	 	$	-0-	 	$	6,748.00
	Monthly Rent is $6,748.00	 	 	 	 	 	 
	Total Owed	 	$	-0-	 	$	6,748.00
	

Paid	
 	
$	

-0-	
 	
 	

-0-
	

Total Due:	
 	
$	

-0-	
 	
$	

6,748.00





        If
you find the above to be correct, please sign in the space provided below and return the original of this letter to us. If you have any questions, please feel free to contact me at
your earliest convenience. 



	Sincerely,	 	Approved.
	
PRESTONWOOD TOWER, LTD.	
 	

/s/

	

Kathi M. Schneider, CPM

Property Manager	
 	

 
	

KMS/bh

Enclosure	
 	

 













QuickLinks



Exhibit 10.16


PRESTONWOOD T O W E R

INDEX


PRESTONWOOD TOWER OFFICE LEASE

WITNESSETH


"RIDER I" RENEWAL OPTION

"RIDER II" RIGHT OF REFUSAL