Document:

EXHIBIT 4.1

                 INTERNATIONAL BUILDING TECHNOLOGIES GROUP, INC.
                    2007 CONSULTANTS RETAINER STOCK PLAN NO.3

1.  INTRODUCTION.  This  Plan  shall  be known  as the  "International  Building
Technologies  Group,  Inc. 2007  Consultants  Retainer  Stock Plan No.3," and is
hereinafter  referred to as the "Plan." The  purposes of this Plan are to enable
International   Building   Technologies   Group,   Inc.,  a  Nevada  corporation
("Company"),  to promote the  interests of the Company and its  stockholders  by
attracting  and  retaining  "Consultants"  (as  defined in  Paragraph  2, below)
capable of furthering  the future  success of the Company and by aligning  their
economic  interests  more closely with those of the Company's  stockholders,  by
paying  their  retainers or fees in the form of shares of the  Company's  common
stock, par value $.001 per share ("Common Stock").

2. DEFINITIONS. The following terms shall have the meanings set forth below:

     "Board" means the Board of Directors of the Company.

     "Change of Control" has the meaning set forth in Paragraph 12(d) hereof.

     "Code" means the Internal  Revenue Code of 1986, as amended,  and the rules
and regulations  thereunder.  References to any provision of the Code or rule or
regulation  thereunder  shall be deemed to  include  any  amended  or  successor
provision, rule or regulation.

     "Committee"  means the committee that  administers this Plan, as more fully
defined in Paragraph 13 hereof.

     "Common Stock" has the meaning set forth in Paragraph 1 hereof.

     "Company" has the meaning set forth in Paragraph 1 hereof.

     "Consultants"  means  Company's  consultants and advisors only if: (i) they
are natural  persons;  (ii) they provide bona fide services to the Company;  and
(iii) the services are not in connection with the offer or sale of securities in
a  capital-raising  transaction,  and do not directly or  indirectly  promote or
maintain a market for the Company's securities.

     "Deferral Election" has the meaning set forth in Paragraph 6 hereof.

     "Deferred  Stock  Account"  means a bookkeeping  account  maintained by the
Company for a Participant  representing the Participant's interest in the shares
credited to such Deferred Stock Account pursuant to Paragraph 7 hereof.

     "Delivery Date" has the meaning set forth in Paragraph 6 hereof.

     "Director" means an individual who is a member of the Board of Directors of
the Company.

     "Dividend  Equivalent" for a given dividend or other  distribution  means a
number of shares of the  Common  Stock  having a Fair  Market  Value,  as of the
record date for such dividend or distribution, equal to the amount of cash, plus
the Fair  Market  Value on the date of  distribution  of any  property,  that is
distributed  with  respect to one share of the  Common  Stock  pursuant  to such
dividend  or  distribution;  such  Fair  Market  Value to be  determined  by the
Committee in good faith.
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     "Effective Date" has the meaning set forth in Paragraph 3 hereof.

     "Exchange Act" has the meaning set forth in Paragraph 12(d) hereof.

     "Fair Market Value" means the mean between the highest and lowest  reported
sales prices of the Common Stock on the New York Stock  Exchange  Composite Tape
or, if not listed on such exchange, on any other national securities exchange on
which the Common  Stock is listed or on The Nasdaq Stock  Market,  or, if not so
listed on any other  national  securities  exchange or The Nasdaq Stock  Market,
then the  average  of the bid price of the  Common  Stock  during  the last five
trading days on the OTC Bulletin  Board  immediately  preceding the last trading
day  prior to the date with  respect  to which  the Fair  Market  Value is to be
determined.  If the  Common  Stock is not then  publicly  traded,  then the Fair
Market  Value of the Common  Stock  shall be the book value of the  Company  per
share as determined on the last day of March, June, September or December in any
year closest to the date when the  determination  is to be made. For the purpose
of determining book value hereunder, book value shall be determined by adding as
of the  applicable  date called for herein the capital,  surplus,  and undivided
profits of the  Company,  and after having  deducted  any  reserves  theretofore
established;  the sum of these items shall be divided by the number of shares of
the Common Stock  outstanding  as of said date,  and the quotient  thus obtained
shall represent the book value of each share of the Common Stock of the Company.

     "Participant" has the meaning set forth in Paragraph 4 hereof.

     "Payment  Time"  means  the time  when a Stock  Retainer  is  payable  to a
Participant  pursuant to Paragraph 5 hereof (without regard to the effect of any
Deferral Election).

     "Stock Retainer" has the meaning set forth in Paragraph 5 hereof.

     "Third Anniversary" has the meaning set forth in Paragraph 6 hereof.

3.  EFFECTIVE  DATE OF THE PLAN.  This Plan was  adopted by the Board  effective
December 12, 2007 ("Effective Date").

4. ELIGIBILITY.  Each individual who is a non-employee Director or Consultant on
the Effective Date and each  individual  who becomes a non-employee  Director or
Consultant  thereafter  during  the term of this  Plan,  shall be a  participant
("Participant") in this Plan, in each case during such period as such individual
remains a  non-employee  Director  or  Consultant  and is not an employee of the
Company or any of its  subsidiaries.  Each credit of shares of the Common  Stock
pursuant to this Plan shall be evidenced by a written  agreement  duly  executed
and  delivered  by or on behalf of the  Company  and a  Participant,  if such an
agreement is required by the Company to assure  compliance  with all  applicable
laws and regulations.

5.  GRANTS  OF  SHARES.   Commencing  on  the  Effective  Date,  the  amount  of
compensation  for services to  non-employee  Directors or  Consultants  shall be
payable in shares of the Common Stock ("Stock Retainer")  pursuant to this Plan.
The deemed  issuance  price of shares of the Common Stock  subject to each Stock
Retainer  shall  not be less than 85  percent  of the Fair  Market  Value of the
Common  Stock  on the date of the  grant.  In the  case of any  person  who owns
securities  possessing more than ten percent of the combined voting power of all
classes of  securities  of the issuer or its parent or  subsidiaries  possessing
voting power, the deemed issuance price of shares of the Common Stock subject to
each Stock  Retainer  shall be at least 100 percent of the Fair Market  Value of
the Common Stock on the date of the grant.

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6. DEFERRAL OPTION. From and after the Effective Date, a Participant may make an
election ("Deferral Election") on an annual basis to defer delivery of the Stock
Retainer  specifying which one of the following ways the Stock Retainer is to be
delivered  (a) on the date which is three  years  after the  Effective  Date for
which it was  originally  payable  ("Third  Anniversary"),  (b) on the date upon
which the  Participant  ceases to be a  Director  or  Consultant  for any reason
("Departure Date") or (c) in three equal annual  installments  commencing on the
Departure Date ("Third  Anniversary" and "Departure Date" each being referred to
herein as a "Delivery Date").  Such Deferral Election shall remain in effect for
each Subsequent Year unless changed,  provided that, any Deferral  Election with
respect to a  particular  Year may not be changed  less than six months prior to
the  beginning  of such  Year,  and  provided,  further,  that no more  than one
Deferral Election or change thereof may be made in any Year.

Any Deferral  Election  and any change or  revocation  thereof  shall be made by
delivering  written  notice  thereof to the  Committee  no later than six months
prior to the beginning of the Year in which it is to be effected; provided that,
with respect to the Year beginning on the Effective Date, any Deferral  Election
or  revocation  thereof must be delivered no later than the close of business on
the 30th day after the Effective Date.

7. DEFERRED STOCK ACCOUNTS.  The Company shall maintain a Deferred Stock Account
for each  Participant who makes a Deferral  Election to which shall be credited,
as of the  applicable  Payment  Time,  the number of shares of the Common  Stock
payable pursuant to the Stock Retainer to which the Deferral  Election  relates.
So long as any amounts in such Deferred Stock Account have not been delivered to
the Participant  under Paragraph 8 hereof,  each Deferred Stock Account shall be
credited as of the payment date for any dividend paid or other distribution made
with  respect to the Common  Stock,  with a number of shares of the Common Stock
equal to (a) the number of shares of the  Common  Stock  shown in such  Deferred
Stock Account on the record date for such dividend or distribution multiplied by
(b) the Dividend Equivalent for such dividend or distribution.

8. DELIVERY OF SHARES.

     (a)  The  shares of the  Common  Stock in a  Participant's  Deferred  Stock
          Account  with  respect  to any Stock  Retainer  for  which a  Deferral
          Election has been made (together with dividends  attributable  to such
          shares  credited to such Deferred Stock Account) shall be delivered in
          accordance  with this  Paragraph  8 as soon as  practicable  after the
          applicable  Delivery Date.  Except with respect to a Deferral Election
          pursuant  to  Paragraph  6  hereof,  or other  agreement  between  the
          parties, such shares shall be delivered at one time; provided that, if
          the number of shares so delivered  includes a fractional  share,  such
          number shall be rounded to the nearest whole number of shares.  If the
          Participant has in effect a Deferral  Election pursuant to Paragraph 6
          hereof,  then such shares  shall be  delivered  in three equal  annual
          installments  (together  with  dividends  attributable  to such shares
          credited  to  such  Deferred  Stock  Account),  with  the  first  such
          installment  being delivered on the first  anniversary of the Delivery
          Date;  provided  that,  if in order  to  equalize  such  installments,
          fractional shares would have to be delivered,  such installments shall
          be adjusted by rounding to the nearest whole share. If any such shares
          are to be delivered  after the  Participant has died or become legally
          incompetent,  they shall be delivered to the  Participant's  estate or
          legal guardian,  as the case may be, in accordance with the foregoing;
          provided  that,  if the  Participant  dies  with a  Deferral  Election
          pursuant to Paragraph 6 hereof in effect,  the Committee shall deliver
          all  remaining   undelivered   shares  to  the  Participant's   estate
          immediately.  References to a Participant in this Plan shall be deemed
          to  refer  to  the  Participant's  estate  or  legal  guardian,  where
          appropriate.

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     (b)  The Company may, but shall not be required to,  create a grantor trust
          or utilize an  existing  grantor  trust (in either  case,  "Trust") to
          assist it in  accumulating  the shares of the Common  Stock  needed to
          fulfill its obligations under this Paragraph 8. However,  Participants
          shall have no beneficial or other interest in the Trust and the assets
          thereof,  and  their  rights  under  this  Plan  shall  be as  general
          creditors of the Company,  unaffected by the existence or nonexistence
          of  the  Trust,   except  that   deliveries  of  Stock   Retainers  to
          Participants  from the Trust shall, to the extent thereof,  be treated
          as satisfying the Company's obligations under this Paragraph 8.

9. SHARE  CERTIFICATES;  Voting and Other Rights.  The  certificates  for shares
delivered to a Participant  pursuant to Paragraph 8 above shall be issued in the
name of the  Participant,  and from and  after  the  date of such  issuance  the
Participant shall be entitled to all rights of a stockholder with respect to the
Common Stock for all such shares issued in his name, including the right to vote
the  shares,   and  the  Participant  shall  receive  all  dividends  and  other
distributions paid or made with respect thereto.

10. GENERAL RESTRICTIONS.

     (a)  Notwithstanding  any other  provision of this Plan or agreements  made
          pursuant  thereto,  the  Company  shall  not be  required  to issue or
          deliver any certificate or certificates for shares of the Common Stock
          under  this  Plan  prior  to  fulfillment  of  all  of  the  following
          conditions:

          (i)  Listing or approval for listing upon official  notice of issuance
               of such  shares on the New York  Stock  Exchange,  Inc.,  or such
               other securities  exchange as may at the time be a market for the
               Common Stock or the  quotation of such shares on the OTC Bulletin
               Board;

          (ii) Any registration or other  qualification of such shares under any
               state or federal law or regulation,  or the maintaining in effect
               of  any  such  registration  or  other  qualification  which  the
               Committee  shall,  upon the advice of counsel,  deem necessary or
               advisable; and

          (iii)Obtaining any other consent,  approval,  or permit from any state
               or federal  governmental  agency which the Committee shall, after
               receiving  the advice of counsel,  determine  to be  necessary or
               advisable.

     (b)  Nothing contained in this Plan shall prevent the Company from adopting
          other or additional compensation arrangements for the Participants.

11.  SHARES  AVAILABLE.  Subject to  Paragraph 12 below,  the maximum  number of
shares of the Common Stock which may in the aggregate be paid as Stock Retainers
pursuant to this Plan is  15,000,000.  Shares of the Common Stock issuable under
this Plan may be taken  from  treasury  shares of the  Company,  authorized  but
unissued shares of the Company or purchased on the open market.

12. ADJUSTMENTS; CHANGE OF CONTROL.

     (a)  In the event that there is, at any time  after the Board  adopts  this
          Plan, any change in corporate  capitalization,  such as a stock split,
          combination of shares, exchange of shares, warrants or rights offering
          to purchase the Common  Stock at a price below its Fair Market  Value,
          reclassification, or recapitalization or a corporate transaction, such

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          as any merger, consolidation,  separation, including a spin-off, stock
          dividend or other  extraordinary  distribution of stock or property of
          the Company,  any reorganization  (whether or not such  reorganization
          comes within the  definition  of such term in Section 368 of the Code)
          or any partial or  complete  liquidation  of the Company  (each of the
          foregoing  a  "Transaction"),   in  each  case  other  than  any  such
          Transaction  which constitutes a Change of Control (as defined below),
          (i) the Deferred  Stock Accounts shall not be credited with the amount
          and kind of shares or other property which would have been received by
          a holder of the  number of shares  of the  Common  Stock  held in such
          Deferred  Stock  Account  had such  shares of the  Common  Stock  been
          outstanding as of the effectiveness of any such Transaction,  (ii) the
          number and kind of shares or other property subject to this Plan shall
          also not be appropriately adjusted to reflect the effectiveness of any
          such  Transaction,  and (iii) the Committee  will not adjust any other
          relevant provisions of this Plan to reflect any such Transaction.

     (b)  If the shares of the  Common  Stock  credited  to the  Deferred  Stock
          Accounts are converted  pursuant to Paragraph  12(a) into another form
          of  property,  references  in this Plan to the Common  Stock  shall be
          deemed,  where  appropriate,  to refer to such other form of property,
          with such  other  modifications  as may be  required  for this Plan to
          operate  in  accordance  with  its  purposes.   Without  limiting  the
          generality of the  foregoing,  references to delivery of  certificates
          for shares of the Common Stock shall be deemed to refer to delivery of
          cash and the incidents of ownership of any other  property held in the
          Deferred Stock Accounts.

     (c)  In lieu of the  adjustment  contemplated  by Paragraph  12(a),  in the
          event of a Change of Control, the following shall occur on the date of
          the Change of Control: (i) the shares of the Common Stock held in each
          Participant's  Deferred Stock Account shall be deemed to be issued and
          outstanding  as of the  Change  of  Control;  (ii) the  Company  shall
          forthwith deliver to each Participant who has a Deferred Stock Account
          all of the shares of the Common  Stock or any other  property  held in
          such Participant's  Deferred Stock Account;  and (iii) this Plan shall
          be terminated.

     (d)  For purposes of this Plan,  "Change of Control"  shall mean any of the
          following events:

          (i)  The  acquisition by any  individual,  entity or group [within the
               meaning  of  Section  13(d)(3)  or  14(d)(2)  of  the  Securities
               Exchange Act of 1934, as amended  ("Exchange Act")] ("Person") of
               beneficial   ownership   (within   the   meaning  of  Rule  13d-3
               promulgated  under the Exchange Act) of 40 percent or more of (1)
               the then  outstanding  shares of the Common  Stock of the Company
               ("Outstanding  Company Common Stock"), or (2) the combined voting
               power  of  then  outstanding  voting  securities  of the  Company
               entitled  to  vote   generally   in  the  election  of  directors
               ("Outstanding  Company Voting  Securities");  provided,  however,
               that the following  acquisitions shall not constitute a Change of
               Control: (A) any acquisition directly from the Company (excluding
               an  acquisition  by  virtue  of  the  exercise  of  a  conversion
               privilege  unless  the  security  being so  converted  was itself
               acquired  directly from the Company),  (B) any acquisition by the
               Company,  (C) any  acquisition  by any employee  benefit plan (or
               related  trust)  sponsored  or  maintained  by the Company or any
               corporation  controlled by the Company or (D) any  acquisition by
               any  corporation   pursuant  to  a   reorganization,   merger  or
               consolidation,  if,  following  such  reorganization,  merger  or
               consolidation,  the conditions  described in clauses (A), (B) and
               (C) of paragraph (iii) of this Paragraph 12(d) are satisfied; or

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          (ii) Individuals  who, as of the date hereof,  constitute the Board of
               the Company (as of the date hereof ("Incumbent  Board") cease for
               any  reason  to  constitute  at least a  majority  of the  Board;
               provided,  however,  that  any  individual  becoming  a  Director
               subsequent to the date hereof whose  election,  or nomination for
               election by the Company's stockholders, was approved by a vote of
               at  least  a  majority  of  the  Directors  then  comprising  the
               Incumbent  Board shall be  considered  as though such  individual
               were a member of the Incumbent  Board,  but  excluding,  for this
               purpose,  any such individual whose initial  assumption of office
               occurs as a result of  either  an actual or  threatened  election
               contest (as such terms are used in Rule 14a-11 of Regulation  14A
               promulgated under the Exchange Act) or other actual or threatened
               solicitation  of proxies or  consents by or on behalf of a Person
               other than the Board; or

          (iii)Approval by the stockholders of the Company of a  reorganization,
               merger,   binding  share  exchange  or   consolidation,   unless,
               following such reorganization,  merger, binding share exchange or
               consolidation:  (A) more than 60 percent of,  respectively,  then
               outstanding  shares of common stock of the corporation  resulting
               from such  reorganization,  merger,  binding  share  exchange  or
               consolidation  and the combined voting power of then  outstanding
               voting securities of such corporation  entitled to vote generally
               in the election of directors is then beneficially owned, directly
               or indirectly, by all or substantially all of the individuals and
               entities who were the  beneficial  owners,  respectively,  of the
               Outstanding  Company Common Stock and Outstanding  Company Voting
               Securities  immediately  prior  to such  reorganization,  merger,
               binding share exchange or consolidation in substantially the same
               proportions  as  their  ownership,   immediately  prior  to  such
               reorganization,  merger, binding share exchange or consolidation,
               of the Outstanding  Company Common Stock and Outstanding  Company
               Voting  Securities,  as the case may be, (B) no Person (excluding
               the Company,  any employee benefit plan (or related trust) of the
               Company or such corporation  resulting from such  reorganization,
               merger,  binding share exchange or  consolidation  and any Person
               beneficially  owning,  immediately prior to such  reorganization,
               merger,  binding  share  exchange or  consolidation,  directly or
               indirectly,  20 percent or more of the Outstanding Company Common
               Stock or Outstanding  Company Voting Securities,  as the case may
               be) beneficially owns, directly or indirectly, 20 percent or more
               of, respectively,  then outstanding shares of common stock of the
               corporation resulting from such reorganization,  merger,  binding
               share exchange or  consolidation  or the combined voting power of
               then outstanding  voting securities of such corporation  entitled
               to vote generally in the election of directors,  and (C) at least
               a  majority  of the  members  of the  board of  directors  of the
               corporation resulting from such reorganization,  merger,  binding
               share  exchange or  consolidation  were members of the  Incumbent
               Board  at the  time of the  execution  of the  initial  agreement
               providing for such reorganization, merger, binding share exchange
               or consolidation; or

          (iv) Approval  by the  stockholders  of the  Company of (1) a complete
               liquidation  or  dissolution  of the Company,  or (2) the sale or
               other  disposition of all or  substantially  all of the assets of
               the Company,  other than to a corporation,  with respect to which
               following  such  sale or  other  disposition,  (A)  more  than 60
               percent of, respectively, then outstanding shares of common stock
               of  such  corporation  and  the  combined  voting  power  of then
               outstanding  voting  securities of such  corporation  entitled to
               vote generally in the election of directors is then  beneficially
               owned, directly or indirectly, by all or substantially all of the
               individuals   and  entities  who  were  the  beneficial   owners,
               respectively,   of  the  Outstanding  Company  Common  Stock  and

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               Outstanding  Company Voting Securities  immediately prior to such
               sale or other disposition in substantially the same proportion as
               their  ownership,   immediately  prior  to  such  sale  or  other
               disposition,   of  the  Outstanding   Company  Common  Stock  and
               Outstanding Company Voting Securities, as the case may be, (B) no
               Person  (excluding the Company and any employee  benefit plan (or
               related trust) of the Company or such  corporation and any Person
               beneficially  owning,  immediately  prior  to such  sale or other
               disposition,  directly or  indirectly,  20 percent or more of the
               Outstanding  Company Common Stock or  Outstanding  Company Voting
               Securities,  as the case may be) beneficially  owns,  directly or
               indirectly, 20 percent or more of, respectively, then outstanding
               shares  of  common  stock of such  corporation  and the  combined
               voting  power  of  then  outstanding  voting  securities  of such
               corporation  entitled  to  vote  generally  in  the  election  of
               directors,  and (C) at least a  majority  of the  members  of the
               board  of  directors  of such  corporation  were  members  of the
               Incumbent  Board  at the  time of the  execution  of the  initial
               agreement or action of the Board providing for such sale or other
               disposition of assets of the Company.

13. ADMINISTRATION; AMENDMENT AND TERMINATION.

     (a)  This Plan  shall be  administered  by a  committee  consisting  of two
          members  who shall be the current  Directors  of the Company or senior
          executive  officers or other Directors who are not Participants as may
          be  designated by the Chief  Executive  Officer  ("Committee"),  which
          shall have full  authority to construe  and  interpret  this Plan,  to
          establish,  amend and rescind rules and  regulations  relating to this
          Plan, and to take all such actions and make all such determinations in
          connection with this Plan as it may deem necessary or desirable.

     (b)  The Board may from time to time  make such  amendments  to this  Plan,
          including  those  necessary  to preserve or come within any  exemption
          from liability under Section 16(b) of the Exchange Act, as it may deem
          proper  and in  the  best  interest  of the  Company  without  further
          approval of the Company's  stockholders,  provided that, to the extent
          required under Nevada law or to qualify  transactions  under this Plan
          for exemption under Rule 16b-3  promulgated under the Exchange Act, no
          amendment to this Plan shall be adopted  without  further  approval of
          the Company's stockholders and, provided,  further, that if and to the
          extent  required  for this Plan to comply with Rule 16b-3  promulgated
          under the  Exchange  Act, no amendment to this Plan shall be made more
          than once in any six month period that would change the amount,  price
          or timing of the grants of the Common  Stock  hereunder  other than to
          comport  with  changes in the Code,  the  Employee  Retirement  Income
          Security Act of 1974, as amended, or the regulations  thereunder.  The
          Board may  terminate  this Plan at any time by a vote of a majority of
          the members thereof.

14.  TERM OF PLAN.  No shares of the Common  Stock  shall be issued,  unless and
until the  Directors of the Company have  approved this Plan and all other legal
requirements  have  been  met.  This Plan was  adopted  by the  Board  effective
December 12, 2007, and shall expire on December 11, 2012.

15.  GOVERNING LAW. This Plan and all actions taken  hereunder shall be governed
by, and construed in accordance with, the laws of the State of Nevada.

16.  INFORMATION  TO  SHAREHOLDERS.  The  Company  shall  furnish to each of its
stockholders financial statements of the Company at least annually.

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17. MISCELLANEOUS.

     (a)  Nothing in this Plan shall be deemed to create any  obligation  on the
          part of the Board to nominate  any  Director  for  re-election  by the
          Company's  stockholders or to limit the rights of the  stockholders to
          remove any Director.

     (b)  The Company shall have the right to require,  prior to the issuance or
          delivery of any shares of the Common Stock pursuant to this Plan, that
          a Participant make arrangements  satisfactory to the Committee for the
          withholding  of any taxes  required by law to be withheld with respect
          to the  issuance  or  delivery  of  such  shares,  including,  without
          limitation,  by the  withholding of shares that would  otherwise be so
          issued or delivered,  by withholding from any other payment due to the
          Participant, or by a cash payment to the Company by the Participant.

     IN WITNESS  WHEREOF,  this Plan has been executed  effective as of December
12, 2007.

                     INTERNATIONAL BUILDING TECHNOLOGIES GROUP, INC.

                     By /s/ Kenneth Yeung
                        -------------------------------------
                        Kenneth Yeung
                        President

                                       8EXHIBIT 10.14

                    AMENDMENT NUMBER EIGHT TO REVOLVING CREDIT AGREEMENT

                    This  AMENDMENT  NUMBER  EIGHT TO REVOLVING CREDIT AGREEMENT
              (this  "Amendment'),  dated as of September  26, 2007,  is entered
              into  among  NATIONAL  TECHNICAL   SYSTEMS,   INC.,  a  California
              corporation  ("Parent'),   NTS  TECHNICAL  SYSTEMS,  a  California
              corporation,  dba National Technical Systems ("NTS'), XXCAL, INC.,
              a California  corporation  ("XXCAL'),  APPROVED  ENGINEERING  TEST
              LABORATORIES, INC., a California corporation ("AETL"), ETCR, INC.,
              a California  corporation  ("ETCR"),  ACTON ENVIRONMENTAL  TESTING
              CORPORATION,  a  Massachusetts  corporation  ("Acton"),  and PHASE
              SEVEN LABORATORIES, INC., a California corporation ("Phase Seven")
              and one or more  Subsidiaries  of Parent,  whether now existing or
              hereafter acquired or formed,  which become party to the Agreement
              (as defined below) by executing an Addendum in the form of Exhibit
              1 of the Agreement (NTS, XXCAL, AETL, ETCR, Acton, Phase Seven and
              such other  Subsidiaries  are sometimes  individually  referred to
              herein as a  "Subsidiary  Borrower" and  collectively  referred to
              herein as "Subsidiary  Borrowers",  and  Subsidiary  Borrowers and
              Parent  are  sometimes   individually  referred  to  herein  as  a
              "Borrower" and  collectively  referred to herein as  `Borrowers"),
              the  financial  institutions  from time to time parties  hereto as
              Lenders,   whether  by  execution  hereof  or  an  Assignment  and
              Acceptance in accordance  with Section 11.5 (c) of the  Agreement,
              and Comerica Bank, in its capacity as  contractual  representative
              for itself and the other Lenders ('Agent"),  with reference to the
              following facts:

                    A.    Borrowers,  Agent and  Lenders  are  parties  to  that
              certain Revolving Credit Agreement, dated as of November 21, 2001,
              as  amended by that  certain  Amendment  Number  One to  Revolving
              Credit  Agreement,  dated  as  of  July  17,  2002,  that  certain
              Amendment  Number Two to Revolving Credit  Agreement,  dated as of
              November  25,  2002,  that  certain   Amendment  Number  Three  to
              Revolving  Credit  Agreement,  dated  as of July  21,  2003,  that
              certain Amendment Number Four to Revolving Credit Agreement, dated
              as of  July  30,  2004,  that  certain  Amendment  Number  Five to
              Revolving Credit Agreement, dated as of July 1, 2005, that certain
              Amendment  Number Six to Revolving Credit  Agreement,  dated as of
              March  29,  2006,  and  that  certain  Amendment  Number  Seven to
              Revolving Credit Agreement,  dated as of September 21, 2006 (as so
              amended, the "Agreement');

                    B.    Borrowers and Agent,  in its capacity as Agent for the
              Lenders, entered into that certain Security Agreement, dated as of
              November 21, 2001 (the "Security Agreement');

                    C.    Borrowers,  Agent  and Lenders desire to further amend
              the Agreement in accordance with the terms of this Amendment.

                    NOW,  THEREFORE,  in  consideration  of the  foregoing,  the
              parties hereto hereby agree as follows:

                    1.    Defined Terms.  All initially  capitalized  terms used
              but not defined  herein shall have the  meanings  assigned to such
              terms in the Agreement.

                    2.    Amendments to the Agreement.

                                       23
<PAGE>

                    2.1   Definitions.

                          (a)   The following  definitions  set forth in Section
              1.1 of the  Agreement  are  hereby  amended in their  entirety  as
              follows:

                         "Revolving Loans Maturity Date" means February 1, 2009.

                    3.    Conditions  Precedent to  Effectiveness  of Amendment.
              The  effectiveness  of this Amendment is subject to and contingent
              upon  the  fulfillment  of each  and  every  one of the  following
              conditions:

                          (a)   Agent shall have received this  Amendment,  duly
              executed by Borrowers and all Lenders;

                          (b)   No Event of Default,  Unmatured Event of Default
              or Material Adverse Effect shall have occurred; and

                          (c)   All of the  representations  and  warranties set
              forth herein,  in the Loan Documents and in the Agreement shall be
              true,  complete and accurate in all respects as of the date hereof
              (except for  representations  and  warranties  which are expressly
              stated to be true and correct as of the Closing Date).

                    4.    Representations  and  Warranties.  In  order to induce
              Agent and  Lenders to enter  into this  Amendment,  each  Borrower
              hereby represents and warrants to Agent and Lenders that:

                          (a)   No  Event  of  Default  or  Unmatured  Event  of
              Default is continuing;

                          (b)   All of the  representations  and  warranties set
              forth in the Agreement and the Loan  Documents are true,  complete
              and  accurate  in all  respects  (except for  representations  and
              warranties which are expressly stated to be true and correct as of
              the Closing Date); and

                          (c)   This  Amendment  has  been  duly  executed   and
              delivered by Borrowers, and after giving effect to this Amendment,
              the Agreement and the Loan  Documents  continue to constitute  the
              legal,  valid and binding agreements and obligations of Borrowers,
              enforceable   in   accordance   with   their   terms,   except  as
              enforceability  may be  limited  by  bankruptcy,  insolvency,  and
              similar laws and equitable principles affecting the enforcement of
              creditors' rights generally.

                    5.    Counterparts;  Telefacsimile Execution. This Amendment
              may be executed  in any number of  counterparts  and by  different
              parties on separate counterparts, each of which, when executed and
              delivered,  shall be deemed to be an  original,  and all of which,
              when  taken  together,  shall  constitute  but one  and  the  same
              Amendment.  Delivery of an executed  counterpart of this Amendment
              by  telefacsimile  shall be equally as  effective as delivery of a
              manually  executed  counterpart  of  this  Amendment.   Any  party
              delivering   an  executed   counterpart   of  this   Amendment  by
              telefacsimile  also shall deliver a manually executed  counterpart
              of this  Amendment but the failure to deliver a manually  executed
              counterpart  shall not affect the  validity,  enforceability,  and
              binding effect of this Amendment.

                    6.    Integration.   The   Agreement  as   amended  by  this
              Amendment  constitutes  the  entire  agreement  and  understanding
              between the  parties  hereto  with  respect to the subject  matter
              hereof and thereof,  and supersedes  any and all prior  agreements
              and  understandings,  oral or  written,  relating  to the  subject
              matter hereof

                                       24
<PAGE>

              and thereof

                    7.    Reaffirmation  of  the  Agreement.  The  Agreement  as
              amended hereby and the other Loan  Documents  remain in fall force
              and effect.

                    IN WITNESS  WHEREOF,  the parties  hereto have duly executed
              and  delivered  this  Amendment  as of the date first  hereinabove
              written.

                                             NATIONAL TECHNICAL SYSTEMS, INC.

                                             By:
                                                   Lloyd Blonder, Senior
                                                   Vice President, Finance,
                                                   Treasurer and
                                                   Assistant Secretary

                                             NTS TECHNICAL SYSTEMS dba NATIONAL
                                             TECHNICAL SYSTEMS

                                             By:
                                                   Lloyd Blonder, Senior
                                                   Vice President,
                                                   Finance, Treasurer and
                                                   Assistant Secretary

                                             XXCAL, INC.

                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary

                                             APPROVED ENGINEERING TEST
                                             LABORATORIES, INC.

                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary

                                             ETCR, INC.

                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary

                                       25
<PAGE>

                                             ACTON ENVIRONMENTAL TESTING
                                             CORPORATION

                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Clerk

                                             PHASE SEVEN LABORATORIES, INC.

                                             By:
                                                   Lloyd Blonder, Vice
                                                   President, Treasurer and
                                                   Assistant Secretary

                                             COMERICA BANK, in its capacities as
                                             Agent, Issuing Lender and a Lender

                                             By:
                                                   Vahe S. Medzoyan,
                                                   Vice President

                                             FIRST BANK & TRUST, in its capacity
                                             as a Lender

                                             By:

                                                   Name: Bake Seaton
                                                   Title: Vice President

                                       26

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