Full and Open Acquisition, in practice

FAR clauses/Part 43/Checked 15 Sep 2026

FAR 52.243-1
Changes—Fixed-Price

Clause date
AUG 1987
Prescribed at
FAR 43.205(a)(1). Insert when a fixed-price contract for supplies is contemplated (alternates adapt the clause for other fixed-price situations).
Applies to
Fixed-price supply contracts (alternates for other fixed-price acquisitions).
Flowdown
No flowdown required
52.243-1 contains no subcontract flowdown paragraph. It is not listed in 52.244-6(c)(1) or 52.212-5(e)(1).
Full text
FAR 52.243-1 on Acquisition.gov

… (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make changes within the general scope of this contract in any one or more of the following: (1) Drawings, designs, or specifications when the supplies to be furnished are to be specially manufactured for the Government in accordance with the drawings, designs, or specifications. (2) Method of shipment or packing. (3) Place of delivery. …

From the clause · Codified FAR · FAC 2026-01

Why it matters: The CO's unilateral authority reaches only changes within the general scope and only the listed categories; anything beyond that needs a bilateral modification or is a new procurement.

This is the codified text, not any agency's Revolutionary FAR Overhaul deviation. An agency running a class deviation may have this clause renumbered, rewritten or prescribed differently — check the deviation before you put a clause in a solicitation.

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