Federal Acquisition Regulation
Obtaining contractor acceptance and modifying purchase orders
FAR 13.302-3
(a) When it is desired to consummate a binding contract between the parties before the contractor undertakes performance, the contracting officer shall require written (see Definitions (FAR 2.101) ) acceptance of the purchase order by the contractor. (b) Each purchase order modification shall identify the order it modifies and shall contain an appropriate modification number. (c) A contractor’s written acceptance of a purchase order modification may be required only if- (1) Determined by the contracting officer to be necessary to ensure the contractor’s compliance with the purchase order as revised; or (2) Required by agency regulations.
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