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48 CFR · Federal Acquisition Regulation and Defense supplement

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The codified text (eCFR, as of 2026-10-02). Under the Revolutionary FAR Overhaul ↗, agencies follow class deviations with new text for many parts while the formal rules go through the Federal Register: check the solicitation and your contract's clauses, which rule.

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31 sections with “unilateral modification”

  • FAR 43.103 Types of contract modifications.
    …; and (3) Reflect other agreements of the parties modifying the terms of contracts. (b) Unilateral. A unilateral modification is a contract modification that is signed only by the contracting officer. Unilateral modifications are used, fo…
  • FAR 52.207-5 Option To Purchase Equipment.
    …under this contract. The Contracting Officer may exercise this option only by providing a unilateral modification to the Contractor. The effective date of the purchase will be specified in the unilateral modification and may be any time dur…
  • FAR 30.606 Resolving cost impacts.
    … Shall not combine the cost impacts of any of the following: (A) A required change and a unilateral change. (B) A required change and a noncompliance. (C) A desirable change and a unilateral change. (D) A desirable change and a noncompl…
  • FAR 52.230-6 Administration of Cost Accounting Standards.
    …h applicable CAS and the change is necessary for the Contractor to remain in compliance. Unilateral change means a change in cost accounting practice from one compliant practice to another compliant practice that a Contractor with a CAS-co…
  • DFARS 213.302-3 Obtaining contractor acceptance and modifying purchase orders.
    …ase orders for classified acquisitions. (2) See PGI 213.302-3 for guidance on the use of unilateral modifications. (3) A supplemental agreement converts a unilateral purchase order to a bilateral agreement. If not previously included in t…
  • FAR 42.705 Final indirect cost rates.
    …mounts due to the contractor under the contract; and (ii) Record this determination in a unilateral modification to the contract. (2) This contracting officer determination must be issued as a final decision in accordance with 33.211.
  • FAR 52.216-7 Allowable Cost and Payment.
    …amounts due to the Contractor under the contract; and (B) Record this determination in a unilateral modification to the contract. (ii) This determination constitutes the final decision of the Contracting Officer in accordance with the Dis…
  • DFARS 204.804 Closeout of contract files.
    …contract shall be made to reflect the negotiated settlement for a group of contracts, and unilateral modifications may be made, as appropriate, to other contracts in the group to reflect the negotiated settlement. (iii) For contract closeo…
  • DFARS 204.1103 Procedures.
    …on to exercise an option, or at any other time before issuing a modification other than a unilateral modification making an administrative change, ensure that— (i) The contractor's record is active in the SAM database; and (ii) The contra…
  • FAR 2.101 Definitions.
    …rovisioning, and material handling. Forward pricing rate recommendation means a rate set unilaterally by the administrative contracting officer for use by the Government in negotiations or other contract actions when forward pricing rate a…
  • FAR 19.502-9 Withdrawing or modifying small business set-asides.
    …price), the contracting officer may withdraw the small business set-aside, whether it was unilateral or joint. The contracting officer shall initiate a withdrawal of an individual total or partial small business set-aside, by giving written…
  • FAR 30.603-1 Required changes.
    …rior to the applicability date of the standard, the CFAO shall administer the change as a unilateral change (see 30.603-2). Contractors shall not receive an equitable adjustment that will result in increased costs in the aggregate to the Go…
  • FAR 52.248-1 Value Engineering.
    …with the existing contract. The decision to accept or reject all or part of any VECP is a unilateral decision made solely at the discretion of the Contracting Officer. (f) Sharing rates. If a VECP is accepted, the Contractor shall share in…
  • FAR 14.407-4 Mistakes after award.
    …in bid was made. In addition, it must be clear that the mistake was (1) mutual, or (2) if unilaterally made by the contractor, so apparent as to have charged the contracting officer with notice of the probability of the mistake. (d) Each p…
  • FAR 30.001 Definitions.
    …h applicable CAS and the change is necessary for the contractor to remain in compliance. Unilateral change means a change in cost accounting practice from one compliant practice to another compliant practice that a contractor with a CAS-co…
  • FAR 32.111 Contract clauses for noncommercial purchases.
    …Government's interests, paragraph (a)(7) of the clause permits the contracting officer to unilaterally issue a modification requiring the contractor to withhold 5 percent of amounts due, up to a maximum of $50,000 under the contract. The co…
  • FAR 41.402 Rate changes and regulatory intervention.
    …tory body approves a rate change, any rate change shall be made a part of the contract by unilateral contract modification or otherwise documented in accordance with agency procedures. The approved applicable rate shall be effective on the …
  • FAR 42.302 Contract administration functions.
    …red, making changes in packaging subcontractors or contract shipping points. (63) Cancel unilateral purchase orders when notified of nonacceptance by the contractor. The CAO shall notify the contracting officer when the purchase order is c…
  • FAR 43.101 Definitions.
    As used in this part— Administrative change means a unilateral (see 43.103(b)) contract change, in writing, that does not affect the substantive rights of the parties (e.g., a change in the paying office or the appropriation data). Effect…
  • FAR 43.102 Policy.
    …ontract modification. (b) Contract modifications, including changes that could be issued unilaterally, shall be priced before their execution if this can be done without adversely affecting the interest of the Government. If a significant …
  • FAR 43.201 General.
    …overnment contracts contain a changes clause that permits the contracting officer to make unilateral changes, in designated areas, within the general scope of the contract. These are accomplished by issuing written change orders on Standard…
  • FAR 43.204 Administration.
    …ut administrative changes and changes issued pursuant to a clause giving the Government a unilateral right to make a change (e.g., an option clause) initially require only one document. (b) Definitization. (1)(i) Contracting officers shall…
  • FAR 43.301 Use of forms.
    …on; (ii) Change orders issued under the Changes clause of the contract; (iii) Any other unilateral contract modification issued under a contract clause authorizing such modification without the consent of the contractor; (iv) Administrat…
  • FAR 48.103 Processing value engineering change proposals.
    …cation, explaining the reasons for rejection. (c) The following Government decisions are unilateral decisions made solely at the discretion of the Government: (1) The decision to accept or reject a VECP. (2) The determination of collater…
  • FAR 52.232-7 Payments under Time-and-Materials and Labor-Hour Contracts.
    …esentative. (7) Unless otherwise prescribed in the Schedule, the Contracting Officer may unilaterally issue a contract modification requiring the Contractor to withhold amounts from its billings until a reserve is set aside in an amount th…
  • FAR 52.232-16 Progress Payments.
    …ting the unliquidated progress payments accordingly. The Government reserves the right to unilaterally change from the ordinary liquidation rate to an alternate rate when deemed appropriate for proper contract financing. (c) Reduction or s…
  • FAR 52.248-3 Value Engineering—Construction.
    …with the existing contract. The decision to accept or reject all or part of any VECP is a unilateral decision made solely at the discretion of the Contracting Officer. (f) Sharing—(1) Rates. The Government's share of savings is determined …
  • DFARS 227.7103-12 Government right to establish conformity of markings.
    …hen it is impracticable to return technical data for correction, contracting officers may unilaterally correct any nonconforming markings at Government expense. Prior to correction, the data may be used in accordance with the proper restric…
  • DFARS 227.7203-12 Government right to establish conformity of markings.
    …uter software or computer software documentation for correction, contracting officers may unilaterally correct any nonconforming markings at Government expense. Prior to correction, the software or documentation may be used in accordance wi…
  • DFARS 252.217-7028 Over and above work.
    … parties cannot agree upon the procedures, the Administrative Contracting Officer has the unilateral right to direct the over and above work procedures to be followed. These procedures shall, as a minimum, cover— (1) The format, content, a…
  • DFARS 252.227-7038 Patent Rights—Ownership by the Contractor (Large Business).
    …wing paragraph (b)(2)(v) to the basic clause: (v) The agency reserves the right to— (A) Unilaterally amend this contract to identify specific treaties or international agreements entered into or to be entered into by the Government after …

FAR (chapter 1)

DFARS (chapter 2, Defense)

Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Rule changes in progress: FAR, DFARS. Terms: glossary.