Document:

<PAGE>
                                                                   EXHIBIT 10.72

                     NATIONAL FINANCIAL COMMUNICATIONS CORP

                              CONSULTING AGREEMENT

         AGREEMENT made as of the 9th day of July, 2003 by and between Invisa
Inc., maintaining its principal offices at 4400 Independence Court, Sarasota, FL
34234 (hereinafter referred to as "Client") and National Financial
Communications Corp. DBA/ OTC Financial Network, a Commonwealth of Massachusetts
corporation maintaining its principal offices at 300 Chestnut St, Suite 200,
Needham, MA 02492 (hereinafter referred to as the "Company").

                              W I T N E S S E T H :

         WHEREAS, Company is engaged in the business of providing and rendering
public relations and communications services and has knowledge, expertise and
personnel to render the requisite services to Client; and

         WHEREAS, Client is desirous of retaining Company for the purpose of
obtaining public relations and corporate communications services so as to
better, more fully and more effectively deal and communicate with its
shareholders and the investment banking community.

         NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements contained herein, it is agreed as follows:

         I.       Engagement of Company. Client herewith engages Company and
Company agrees to render to Client public relations, communications, advisory
and consulting services.

                  A.       The consulting services to be provided by the Company
shall include, but are not limited to, the development, implementation and
maintenance of an ongoing program to increase the investment community's
awareness of Client's activities and to stimulate the investment community's
interest in Client. Client acknowledges that Company's ability to relate
information regarding Client's activities is directly related to the information
provided by Client to the Company.

                  B.       Client acknowledges that Company will devote such
time as is reasonably necessary to perform the services for Client, having due
regard for Company's commitments and obligations to other businesses for which
it performs consulting services.

         II.      Compensation and Expense Reimbursement.

                  A.       Client will pay the Company, as compensation for the
services provided for in this Agreement and as reimbursement for expenses
incurred by Company on Client's behalf, in the manner set forth in Schedule A
annexed to this Agreement which Schedule is incorporated herein by reference.

                  B.       In addition to the compensation and expense
reimbursement referred to in Section 2(A) above, Company shall be entitled to
receive from Client a "Transaction Fee", as a result of any Transaction (as
described below) between Client and any other company, entity, person, group or
persons or other party which is introduced to, or put in contact with, Client by
Company, or by which Client has been introduced to, or has been put in contact
with, by Company. A "Transaction" shall mean merger, sale of stock, sale of
assets, consolidation or other similar transaction or series or combination of

<PAGE>

transactions whereby Client or such other party transfer to the other, or both
transfer to a third entity or person, stock, assets, or any interest in its
business in exchange for stock, assets, securities, cash or other valuable
property or rights, or wherein they make a contribution of capital or services
to a joint venture, commonly owned enterprise or business opportunity with the
other for purposes of future business operations and opportunities. To be a
Transaction covered by this section, the transaction must occur during the term
of this Agreement or the one year period following the expiration of this
Agreement.

         The calculation of a Transaction Fee shall be based upon the total
value of the consideration, securities, property, business, assets or other
value given, paid, transferred or contributed by, or to, the Client and shall
equal 10% of the dollar value of the Transaction in the event of a transaction
which is an equity investment in Client up to $5,000,000 in Transaction value
and 7% thereafter. In the event of a transaction that is a loan to the Client,
the Transaction Fee shall be 5% of the principal amount of the loan. In a
merger, sale of assets or joint venture, the Transaction Fee shall be based on
the Lehman Formula. Such fee shall be paid by certified funds as received by
Client.

         The Transaction Fee shall be subject to the following: (i) the
Transaction Fee shall be limited to closed and funded financings, (ii) the
acceptance or rejection of any financing is in the sole discretion of the Client
and (iii) the Transaction Fee represents the aggregate or total fee that Client
can be required to pay in the financing and should there be additional parties
entitled to fees as a result of the transaction, the Transaction Fee shall be
shared by the Company.

         Term and Termination. This Agreement shall be for a period of 6 months
commencing on July 9, 2003 and terminating January 9, 2004. If the Client
approves in writing, the contract will be automatically extended for an
additional three months. Either party hereto shall have the right to terminate
this Agreement upon 15 days prior written notice to the other party.

         Professional Services. The Company shall only provide professional
services reasonably calculated to be consistent with the standards employed by
other well respected professionals in the investor and public relations
industry. The Company shall only publish and use information regarding the
Client in a fair, balanced and professional manner. The Company shall not
publish or use: (i) nonpublic information regarding the Client or forward
looking statements regarding the Client without written authorization from the
Client.

         Treatment of Confidential Information. Company shall not disclose,
without the consent of Client, any financial and business information concerning
the business, affairs, plans and programs of Client which are delivered by
Client to Company in connection with Company's services hereunder, provided such
information is plainly and prominently marked in writing by Client as being
confidential (the "Confidential Information"). The Company will not be bound by
the foregoing limitation in the event (i) the Confidential Information is
otherwise disseminated and becomes public information or (ii) the Company is
required to disclose the Confidential Informational pursuant to a subpoena or
other judicial order.

         Representation by Company of other clients. Client acknowledges and
consents to Company rendering public relations, consulting and/or communications
services to other clients of the Company engaged in the same or similar business
as that of Client.

         Indemnification by Client as to Information Provided to Company. Client
acknowledges that Company, in the performance of its duties, will be required to
rely upon the accuracy and completeness of information supplied to it by
Client's officers, directors, agents and/or employees. Client agrees to
indemnify, hold harmless and defend Company, its officers, agents and/or
employees from any

<PAGE>

proceeding or suit which arises out of or is due to the inaccuracy or
incompleteness of any material or information supplied by Client to Company.

         Independent Contractor. It is expressly agreed that Company is acting
as an independent contractor in performing its services hereunder. Client shall
carry no workers compensation insurance or any health or accident insurance on
Company or consultant's employees. Client shall not pay any contributions to
social security, unemployment insurance, Federal or state withholding taxes nor
provide any other contributions or benefits which might be customary in an
employer-employee relationship.

         Non-Assignment. This Agreement shall not be assigned by either party
without the written consent of the other party.

         Notices. Any notice to be given by either party to the other hereunder
shall be sufficient if in writing and sent by registered or certified mail,
return receipt requested, addressed to such party at the address specified on
the first page of this Agreement or such other address as either party may have
given to the other in writing.

         Entire Agreement. The within agreement contains the entire agreement
and understanding between the parties and supersedes all prior negotiations,
agreements and discussions concerning the subject matter hereof.

         Modification and Waiver. This Agreement may not be altered or modified
except by writing signed by each of the respective parties hereof. No breach or
violation of this Agreement shall be waived except in writing executed by the
party granting such waiver.

         Law to Govern; Forum for Disputes. This Agreement shall be governed by
the laws of the Commonwealth of Massachusetts without giving effect to the
principle of conflict of laws. Each party acknowledges to the other that courts
within the City of Boston, Massachusetts shall be the sole and exclusive forum
to adjudicate any disputes arising under this agreement. In the event of
delinquent fees owed to the Company, Client will be responsible for pay for all
fees associated with the collection of these fees.

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

National Financial Communications Corp.

By:    /s/ Geoffrey Eiten                                   6/22/03
     -----------------------------------         ----------------------
     Geoffrey Eiten, President                   Date

Invisa Inc.

By:    /s/ Stephen A. Michael, President                    7/9/03
     -----------------------------------         ----------------------
     Stephen A. Michael, President               Date

<PAGE>

SCHEDULE A-1 PAYMENT FOR SERVICES AND REIMBURSEMENT OF EXPENSES.

SCHEDULE A-2 GRANT OF OPTIONS TO NATIONAL FINANCIAL COMMUNICATIONS CORP. IN
ADVANCE OF SERVICES RENDERED

<PAGE>

SCHEDULE A-1

PAYMENT FOR SERVICES AND REIMBURSEMENT OF EXPENSES

         A. For the services to be rendered and performed by Company during the
term of the Agreement, Client shall pay to Company the sum of $5,000 per month
for the first two months of the contract and then $3,000 per month for the
remaining term and any extensions to the contract.

         B. Client shall also reimburse Company for all reasonable and necessary
out-of-pocket expenses incurred in the performance of its duties for Client upon
presentation of statements setting forth in reasonable detail the amount of such
expenses. Company shall not incur any expense for any single item in excess of
$250 either verbally or written except upon the prior approval of the Client.
Company agrees that any travel, entertainment or other expense which it may
incur and which may be referable to more than one of its clients (including
Client) will be prorated among the clients for whom such expense has been
incurred. Shares will be accepted for payment of expenses in the same manner as
the base fee per month in Paragraph A above.

National Financial Communications Corp.

By:    /s/ Geoffrey Eiten                                   6/22/03
     -----------------------------------         ----------------------
     Geoffrey Eiten, President                   Date

Invisa Inc.

By:    /s/ Stephen A. Michael, President                    7/9/03
     -----------------------------------         ----------------------
     Stephen A. Michael, President               Date

<PAGE>

SCHEDULE A-2

GRANT OF OPTIONS TO NATIONAL FINANCIAL COMMUNICATIONS CORP. IN ADVANCE OF
SERVICES RENDERED

         A.       Grant of Options and Option Exercise Price. As compensation
for the services to be rendered by Company hereunder, Client herewith issues and
grants to Company stock options (the "Options") to purchase an aggregate of
100,000 shares of Client's Common Stock as follows:

(i) 25,000 options at a strike price of $3.00 per share vesting immediately upon
signing of this agreement
(ii) 25,000 options at a strike price of $3.50 per share vesting 60 days after
the signing of this agreement
(iii) 25,000 options at a strike price of $4.00 per share vesting 90 days after
the signing of this agreement
(iv) 25,000 options at a strike price of $4.50 per share vesting 120 days after
the signing of this agreement

The Options are exercisable upon and subject to the terms and conditions
contained herein. The Options are exercisable during the period commencing on
the date hereof and ending three years subsequent to the termination date of
this Agreement. These restricted shares will be issued to the Company upon the
signing of this Agreement and held by the Client until payment is made.

         B.       Manner of Exercise. Exercise of any of the Options by Company
shall be by written notice to Client accompanied by Company's certified or bank
check for the purchase price of the shares being purchased. Upon receipt of such
notice and payment, Client shall promptly cause to be issued, without transfer
or issue tax to the option holder or other person entitled to exercise the
option, the number of shares for which the Option has been exercised, registered
in the name of Company. Such shares, when issued, shall be fully paid and
non-assessable.

         C.       Option Shares. Company acknowledges that any shares which it
may acquire from Client pursuant to the exercise of the Options provided for
herein will not have been registered pursuant to the Securities Act of 1933, as
amended (the "Securities Act"), and therefore may not be sold or transferred by
Company except in the event that such shares are the subject of a registration
statement or any future sale or transfer is, in the opinion of counsel for
Client, exempt from such registration provisions. Company acknowledges that any
shares which it may acquire pursuant to the exercise of the Options will be for
its own account and for investment purposes only and not with a view to the
resale or redistribution of same. Company further consents that the following
legend be placed upon all certificates for shares of Common Stock which may be
issued to Company upon the exercise of the Options:

"THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED (THE "ACT") AND MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT
OR AN OPINION OF COUNSEL SATISFACTORY TO THE CORPORATION THAT SUCH REGISTRATION
IS NOT REQUIRED."

Company further consents that no stop transfer instructions being placed against
all certificates may not be issued to it upon the exercise of the Options.

         (i)      If the Client executes a Registration during the term of the
contract, then the Company's shares will be added to this Registration at no
cost to the Company. The Client shall bear all costs and expenses attributable
to such registration, excluding fees and expenses of Company's counsel

<PAGE>

and any underwriting or selling commission. Client shall maintain the
effectiveness of such registration throughout the term of this Agreement and for
a 120 day period thereafter.

         (ii)     Notwithstanding the foregoing, if the Shares issuable upon
exercise of the Options are not otherwise registered under the Securities Act
and the Client shall at any time after the date hereof propose to file a
registration statement under the Securities Act, which registration statement
shall include shares of Common Stock of Client or any selling shareholder,
Client shall give written notice to Company of such proposed registration and
will permit Company to include in such registration all Shares which it has
acquired as of the date of such notice. The Client shall bear all costs and
expenses attributable to such registration, excluding fees and expenses of
Company's counsel and any underwriting or selling commission.

D.       Adjustments in Option Shares.

         (i)      In the event that Client shall at any time sub-divide its
outstanding shares of Common Stock into a greater number of shares, the Option
purchase price in effect prior to such sub-division shall be proportionately
reduced and the number of shares of Common Stock purchasable shall be
proportionately increased. In case the outstanding shares of Common Stock of
Client shall be combined into a smaller number of shares, the Option purchase
price in effect immediately prior to such combination shall be proportionately
increased and the number of shares of Common Stock purchasable shall be
proportionately reduced.

         (ii)     In case of any reclassification or change of outstanding
shares of Common Stock issuable upon exercise of this Option (other than change
in par value, or from par value to no par value, or from no par value to par
value, or as a result or a subdivision or combination), or in case of any
consolidation or merger of the Client with or into another corporation (other
than a merger in which the Client is the continuing corporation and which does
not result in any reclassification or change of outstanding shares of Common
Stock, other than a change in number of the shares issuable upon exercise of the
Option) or in case of any sale or conveyance to another corporation of the
property of the Client as an entirety or substantially as an entirety, the
Holder of this Option shall have the right thereafter to exercise this Option
into the kind and amount of shares of stock and other securities and property
receivable upon such reclassification, change, consolidation, merger, sale or
conveyance by a holder of the number of shares of Common Stock of the Client for
which the Option might have been exercised immediately prior to such
reclassification, change, consolidation, merger, sale or conveyance. The above
provisions shall similarly apply to successive reclassifications and changes of
shares of Common Stock and to successive consolidations, mergers, sales or
conveyances.

         (iii)    The Company reserves the right to assign these options to a
third party at its own discretion.

National Financial Communications Corp.

By:    /s/ Geoffrey Eiten                                   6/22/03
     -----------------------------------         ----------------------
     Geoffrey Eiten, President                   Date

Invisa Inc.

By:    /s/ Stephen A. Michael, President                    7/9/03
     -----------------------------------         ----------------------
     Stephen A. Michael, President               Date<PAGE>
                                                                   EXHIBIT 10.73

(LOGO)
BROOKS, HOUGHTON & COMPANY, INC.
444 Madison Avenue - 25th Floor - New York, NY 10022 - Telephone: 212-753-1991
- Facsimile: 212-753-7730
-------------------------------------------------------------------------------

BY EMAIL AND POST
Confidential

July 9, 2003

Mr. Steve Michael
President
Invisa Inc.
4400 Independence Court
Sarasota, FL  34234

Dear Steve:

This letter ("Agreement") sets forth the terms by which Invisa Inc. (the
"Company" or "Invisa") will protect and compensate Brooks, Houghton & Company,
Inc. ("BHC") on all groups that BHC introduces to the Company with the intent of
purchasing debt or equity securities (the "Placement Transaction") of Invisa in
conjunction with a private placement or in connection with the identification of
and agreement with a strategic alliance partner acceptable to the Company. All
fees are contingent upon the financing closing and funding. Invisa shall have
sole discretion to accept or reject any financing introduced or proposed by BHC.
The fees payable to BHC are aggregate fees and, to the extent Invisa is
obligated to pay transaction fees to others as a result of the same transaction,
shall be split among the various parties entitled to participate therein. Fees
shall be paid in the same manner as the underlying consideration/proceeds
received by Invisa

FINANCING

If a Placement Transaction is consummated, the Company will pay in full to BHC a
"Placement Fee" in cash at the initial and all subsequent closing(s) of the
Placement Transaction as follows:

         a. Upon the placement of all forms of equity, including shares of
         preferred stock, BHC will be paid a placement fee of 7% of the total
         value of the placement received by Invisa. The "total value of the
         placement" shall mean the total amount of proceeds received from the
         purchasers of the equity sold in such Placement Transaction.

         b. Upon placement of all forms of senior or subordinated term debt, BHC
         will be paid a placement fee of 5% of the proceeds as received by
         Invisa.

         c. Upon the placement of bank or finance company working capital lines
         of credit, BHC will be paid a placement fee of 1.5% of the total value
         of the placement.

Additionally, at the closing of a Placement Transaction for equity or senior or
subordinated debt arranged by BHC, the Company shall grant to BHC five-year
warrants (the "Warrants") to purchase a number of shares of the Company's equity
equal to 3% of the total value of the placement relating to the Placement
Transaction (i.e. (3% X Total Value of the Placement)/ current price per share =
number of shares covered by warrant). The Warrants shall have an exercise price
equal to 105% of the price per share of the Company's equity expressly or
implicitly paid by investors associated with the corresponding Placement
Transaction.

<PAGE>

Date:    July 9, 2003
Page:    2
Re:      Invisa Agreement Letter

STRATEGIC ALLIANCE

In the event that BHC makes an initial introduction of the Company to a
potential strategic partner, or if BHC materially advances (with the Company's
prior written consent and acknowledgement for compensation) discussions already
begun by the Company to a strategic partner prospect then the Company hereby
agrees to pay to BHC a cash fee of 3.0% of the Transaction Value up to $30
million and 2% of the Transaction Value from $30 million to $50 million and 1%
over $50 million.

"Transaction Value" shall equal the total consideration paid or received and to
be paid or received (which shall be deemed to include amounts paid into escrow)
in connection with a strategic alliance including, without limitation: (i) cash;
(ii) notes, securities, and other property valued at the "fair market value"
thereof; (iii) liabilities, including all debt assumed less target's cash
balance on the closing date; and (iv) payments to be made in installments ( as
received). For purposes of this definition, "fair market value" of (a) notes or
securities that are traded in an established public market shall be determined
on the basis of the closing market price on the last trading day prior to the
public announcement of such strategic alliance and (b) notes or securities that
have no established public market or consideration that consists of other
property shall be the fair market value thereof on the date of delivery thereof
as determined in good faith by the board of directors of the Company and the
Advisor. Transaction Value shall not include amounts paid under covenants not to
compete, salaries, employment termination payments or royalties. In the event of
a license, joint venture of similar arrangement where Invisa is required to
perform an ongoing service or provide a product, the Transaction Value shall not
include the associated fully loaded cost of the product or service sold or
provided by Invisa (.ie. Transaction Value is adjusted for associated costs))
for a maximum term of five years.

Any portion of any strategic alliance fee attributable to that part of
Transaction Value that is contingent upon the occurrence of any future event
(including amounts paid into escrow) shall be paid by the Company to Advisor
upon the receipt or payment, as applicable, of such Transaction Value. The fee
to be paid to BHC hereunder for any Transaction Value, which is received by
Invisa other than in cash, may be paid by Invisa in the same form as and when
received by Invisa.

OTHER TERMS AND CONDITIONS

1.       Termination and Fees Earned. This Agreement shall be for a period of
three (3) months from the date of execution of this Agreement and thereafter
will be subject to a 30 day termination notice by either party. Notwithstanding
the foregoing, it is agreed that the compensation provisions will survive any
such termination. In the event that this Agreement terminates and no closing of
the Placement occurs, BHC will be entitled, subject to the provisions of this
paragraph, to any Placement Fee and Warrants with respect to any financing
transaction (whether equity, debt or a combination) with any investor that was
contacted by BHC during the term of this agreement with the consent of the
Company for the purposes of the Placement and that is consummated within twelve
(12) months following the termination of this Agreement.

2.       Due Authorization. Each of the parties represents that it is duly
authorized to execute this Agreement.

                                                              ----        ------

<PAGE>

Date:    July 9, 2003
Page:    3
Re:      Invisa Agreement Letter

3.       Expenses. Invisa agrees to reimburse BHC monthly for all reasonable,
documented out-of-pocket expenses incurred in connection with providing the
services outlined in this Letter Agreement. BHC shall not incur expenses,
including expenses of third party service providers, which exceed $500 per month
without Invisa's prior written approval.

4.       Indemnification. Because BHC will be acting on behalf of Invisa, Invisa
and BHC agree to the indemnification provision (the "Indemnification Provision")
attached to this Agreement as Annex A and incorporated herein in its entirety.

5.       Arbitration. Notwithstanding anything to the contrary contained herein,
any controversy or claim arising out of or relating to this Agreement or the
breach thereof, shall be settled by arbitration under the rules of the American
Arbitration Association.

Please confirm that the foregoing is in accordance with your understanding by
signing and returning to Brooks, Houghton & Company, Inc. the enclosed duplicate
of this Letter Agreement.

It is a distinct privilege to be working with you on this important project. We
look forward to developing a long term and mutually successful relationship with
your company.

Sincerely yours,

BROOKS, HOUGHTON & COMPANY, INC. and BROOKS, HOUGHTON SECURITIES, INC.

By:      /s/ Gerald Houghton                    Dated:  July 9,2003
    ---------------------------------------             ----------------------
Name:     Gerald Houghton                       Title:  President
      -------------------------------------             ----------------------

By:      /s/ Kevin Centofanti                   Dated:  July 9, 2003
    ---------------------------------------             ----------------------
Name:     Kevin Centofanti                      Title:  Executive Director
      -------------------------------------             ----------------------

Agreed and Accepted by

INVISA INC.

By:       /s/ Stephen A. Michael, President     Dated:  July 9, 2003
    ---------------------------------------             ----------------------
Name:   Steve Michael                                   Title:  President
      -------------------------------------                     --------------

                                                            ----        ------

<PAGE>

Date:    July 9, 2003
Page:    4
Re:      Invisa Agreement Letter

                                     ANNEX A

                            INDEMNIFICATION PROVISION

Invisa Inc. ("Invisa" or the "Company") agrees to indemnify and hold harmless
Brooks, Houghton & Company, Inc., and its affiliates, Private Corporate
Advisors, Inc., Brooks Houghton Securities, Inc., (collectively "BHC") and their
respective directors, officers, employees, agents and each such person or
entity, if any, who controls BHC or any of its affiliates within the meaning of
the Securities Exchange Act of 1934 (BHC and all above-described entities or
persons being an "Indemnified Party") from and against any and all losses,
claims, damages, liabilities, and expenses whatsoever, joint or several
(including all reasonable fees of counsel and other expenses incurred by an
Indemnified Party in connection with the preparation for or defense of any
claim, action, or proceeding, whether or not resulting in liability), as
incurred, to which such Indemnified Party may become subject under any
applicable Federal or state law, or otherwise, relating to or arising out of any
proposed or consummated transaction covered by the Letter Agreement, except that
the Company will not be liable hereunder to the extent that any loss, claim,
damage, liability or expense in the event of the Indemnified Party's negligence
or malfeasance in the performance of its services described in the Letter
Agreement.

The Company and BHC agree that if any indemnification or reimbursement sought
pursuant to the preceding paragraph is finally judicially determined to be
unavailable (except by reason of the negligence or malfeasance of BHC or its
controlling person, directors, officers, employees or agents, as the case may
be), then the Company and BHC shall contribute to the Liabilities for which such
indemnification or reimbursement is held unavailable in such proportions as is
appropriate to reflect (a) the relative benefits to the Company on the one hand,
and BHC on the other hand, in connection with the transaction to which such
indemnification or reimbursement relates, (b) the relative fault of the parties,
and (c) other equitable considerations; provided, however, that in no event
shall the amount to be contributed by BHC exceed the amount of the fees actually
received by BHC hereunder. In connection with any claim for contribution, Invisa
agrees that it shall not require BHC to contribute any amount in excess of the
amount of fees received by BHC pursuant to this Letter Agreement.

Invisa and BHC mutually agree to notify each other promptly of the assertion
against it or any other person of any claim or the commencement of any action,
proceeding or investigation relating to any activity or transaction contemplated
by this Letter Agreement.

If any Indemnified Party is entitled to indemnification under this Annex A with
respect to any action or proceeding, the Company shall be entitled to assume the
defense of any such action or proceeding with counsel reasonably satisfactory to
the Indemnified Party. Upon assumption by the Company of the defense of any such
action or proceeding, the Indemnified Party shall have the right to participate
in such action or proceeding and to retain its own counsel but the Company shall
not be liable for any legal expenses of other counsel subsequently incurred by
such Indemnified Party in connection with the defense thereof unless (i) the
Company has agreed to pay such fees and expenses, (ii) the Company shall have
failed to employ counsel reasonably satisfactory to the Indemnified Party in a
timely manner, or (iii) the Indemnified Party shall have been advised by counsel
that there are actual or potential conflicting interests between the Company and
the Indemnified Party, including situations in which there are one or more legal

                                                              ----        ------

<PAGE>

Date:    July 9, 2003
Page:    5
Re:      Invisa Agreement Letter

defenses available to the Indemnified Party that are different from those
available to the Company, provided, however, that the Company shall not, in
connection with any one such action or proceeding or separate but substantially
similar actions or proceedings arising out of the same general allegations, be
liable for the fees and expenses of more than one separate firm of attorneys at
any time for all Indemnified Parties, including BHC, except to the extent that
local counsel, in addition to its regular counsel, is required in order to
effectively defend against such action or proceeding. The Company shall not be
liable for any indemnification hereunder with respect to any settlement,
compromise or consent to the entry of any judgment in any pending claim, action
or proceeding affected without its consent, which consent shall not be
unreasonably withheld.

The Company agrees that, without an Indemnified Party's prior written consent,
which consent shall not be unreasonably withheld, it will not settle, compromise
or consent to the entry of any judgment in any commenced or threatened claim,
action, proceeding or investigation in respect of which indemnification could be
sought under the indemnification provisions of the Letter Agreement (whether or
not BHC or any other Indemnified Party is an actual or potential party to such
claim, action, proceeding or investigation).

                                                              ----        ------

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