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<br />S"ppl~ment 10 SF 23-,1, and SF 19-A
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<br />SUPPLEMENT TO GENERAL PROVISIONS AND
<br />LABOR STANDARDS PROVISIONS
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<br />GENERAL PROVISIONS (Standard Fonn 23-A, June 1964 Edition),
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<br />a. Clause No.3. - -Clause No.3, entitled IIChanges,l1 is deleted from Standard Form 23-A
<br />and the following clause is substituted therefor:
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<br />3. CHANGES
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<br />(a) The Contracting Officer may, at any time, without notice to the sureties, by
<br />written order designated or indicated to be a change order. make any change in the
<br />work within the general scope of the contract. Including but not limited to changes:
<br />(i) in the specifications (including drawings and designs);
<br />(ii) in the method or manner of performance of the work;
<br />(iii) in the Government-furnished facilities, equipment. materials, services, or
<br />site; 0"1'
<br />(iv) directing acceleration in the performance of the work.
<br />(b) Any other written order or an oral order (which terms as used in this para-
<br />graph (b) shall include direction, instruction, interpretation, or determination) from
<br />the Contracting Officer, which causes any such change, shall be treated as a change
<br />order under this clause, provided that the Contractor gives the Contracting Officer
<br />written notice stating the date, circumstances, and source of the order and that the
<br />Contractor regards the order as a change order.
<br />(c) Except as herein provided, no order, statement, or conduct of the Contracting
<br />Officer shall be treated as a change under this clause or entitle the Contractor to an
<br />equitable adjustment hereunder.
<br />(d) If any change under this clause causes an increase or decrease in the Contrac.
<br />torls cost of. or the time required for, the performance of any part of the work under
<br />this contract, whether or not changed by any order. an equitable adJustment shall be
<br />made and the contract modified in writing accordingly: Provided, however, That
<br />except for claims based on defective specifications, no claim for any change under (b)
<br />above shall be allowed for any costs incurred more than 20 days before the Contractor
<br />gives written notice as therein required: And provided further, That in the case of
<br />defective specifications for which the Government is responsible, the equitable adjust-
<br />ment shall include any increased cost reasonably incurred by the Contractor in attempt-
<br />ing to comply with such defective specifications.
<br />(e) If the Contractor intends to assert a claim for an equitable adjustment under
<br />this clause. he must, within 30 days after receipt of a written change order under (a)
<br />above or the furnishing of a written notice under (b) above, submit to the Contracting
<br />Officer a written statement setting forth the general nature and monetary extent of
<br />such claim, unless this period is extended by the Government. The statement of claim
<br />hereunder may be included in the notice under (b) above.
<br />(f) No claim by the Contractor for an equitable adjustment hereunder shall be
<br />allowed if asserted after final payment under this contract.
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<br />b. Clause No.4. --Clause No.4, entitled "Changed Conditions, II is deleted from Standard
<br />Form 23-A and the following clause entitled "Differing Site Conditions, II is substituted
<br />therefor:
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<br />4. DIFFERING SITE CONDITIONS
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<br />(a) The Contractor shall promptly. and before such conditions are disturbed. notify
<br />the Contracting Officf'r in writing of: (1) Subsurface or latent physical conditions at the
<br />site differing materially from those indicated in this contract, or (2) unknown physical
<br />conditions at the site, of an unusual nature, differing materially from those ordinarily
<br />encountered and generally recognized as inhering in work of the character provided for
<br />in this contract. The Contracting Officel~ shall promptly investigate the conditions, and
<br />if he finds that such conditions do materially so differ and cause an increase or decrease
<br />in the Contractorls cost of, or the time required for, performance of any part of the
<br />work under this contract, whether or not changed as a result of such conditions, an
<br />equitable adjustment shall be made and the contract modified in writing accordingly.
<br />(b) No claim of the Contractor under this clause shall be allowed unless the Con-
<br />tractor has given the notice required in (a) above; provided, however, the time pre-
<br />scribed therefor may be extended by the Government.
<br />(c) No claim by the Contractor for an equitable adjustment hereunder shall be
<br />allowed if asserted after final payment under this contract.
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