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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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243 sections with “contract changes”: the first 40

  • FAR 49.114 Unsettled contract changes.
    (a) Before settlement of a completely terminated contract, the TCO shall obtain from the contracting office a list of all related unsettled contract changes. The TCO shall settle, as part of final settlement, all unsettled contract changes …
  • FAR 43.104 Notification of contract changes.
    (a) When a contractor considers that the Government has effected or may effect a change in the contract that has not been identified as such in writing and signed by the contracting officer, it is necessary that the contractor notify the Go…
  • DFARS 252.244-7001 Contractor Purchasing System Administration.
    Basic. As prescribed in 244.305-71 and 244.305-71(a), use the following clause: Contractor Purchasing System Administration—Basic (Jan 2025) (a) Definitions. As used in this clause— Acceptable purchasing system means a purchasing system …
  • FAR 8.712 Specification changes.
    (a) The contracting activity shall notify the AbilityOne participating nonprofit agency and appropriate central nonprofit agency of any change in specifications or descriptions. In the absence of such written notification, the AbilityOnepar…
  • FAR 15.201 Exchanges with industry before receipt of proposals.
    …s, and increase efficiency in proposal preparation, proposal evaluation, negotiation, and contract award. (c) Agencies are encouraged to promote early exchanges of information about future acquisitions. An early exchange of information amo…
  • FAR 15.306 Exchanges with offerors after receipt of proposals.
    …s necessary to conduct discussions, the rationale for doing so shall be documented in the contract file (see the provision at 52.215-1) (10 U.S.C. 3303(a)(2) and 41 U.S.C. 3703(a)(2)). (b) Communications with offerors before establishment …
  • FAR 15.408 Solicitation provisions and contract clauses.
    (a) Changes or Additions to Make-or-Buy Program. The contracting officer shall insert the clause at 52.215-9, Changes or Additions to Make-or-Buy Program, in solicitations and contracts when it is contemplated that a make-or- buy program wi…
  • FAR 16.104 Factors in selecting contract types.
    There are many factors that the contracting officer should consider in selecting and negotiating the contract type. They include the following: (a) Price competition. Normally, effective price competition results in realistic pricing, and …
  • FAR 16.203-4 Contract clauses.
    (a) Adjustment based on established prices—standard supplies. (1) The contracting officer shall, when contracting by negotiation, insert the clause at 52.216-2, Economic Price Adjustment—Standard Supplies, or an agency-prescribed clause as …
  • FAR 16.306 Cost-plus-fixed-fee contracts.
    (a) Description. A cost-plus-fixed-fee contract is a cost-reimbursement contract that provides for payment to the contractor of a negotiated fee that is fixed at the inception of the contract. The fixed fee does not vary with actual cost, b…
  • FAR 19.301-2 Rerepresentation by a contractor that represented its status as a small business concern.
    (a) Definition. As used in this subsection— Long-term contract means a contract of more than five years in duration, including options. However, the term does not include contracts that exceed five years in duration because the period of p…
  • FAR 19.704 Subcontracting plan requirements.
    (a) Each subcontracting plan required under 19.301-2(e) and 19.702(a)(1)(i), (ii), and (iii) shall include— (1) Separate percentage goals for using small business (including ANCs and Indian tribes), veteran-owned small business, service-di…
  • FAR 19.705-2 Determining the need for a subcontracting plan.
    The contracting officer shall take the following actions to determine whether a proposed contractual action requires a subcontracting plan: (a)(1) Determine whether the proposed total contract-dollars will exceed the subcontracting plan th…
  • FAR 30.603-1 Required changes.
    (a) General. Offerors shall state whether or not the award of a contract would require a change to an established cost accounting practice affecting existing contracts and subcontracts (see 52.230-1). The contracting officer shall notify th…
  • FAR 30.603-2 Unilateral and desirable changes.
    (a) Unilateral changes. (1) The contractor may unilaterally change its disclosed or established cost accounting practices, but the Government shall not pay any increased cost, in the aggregate, as a result of the unilateral change. (2) Pri…
  • FAR 30.604 Processing changes to disclosed or established cost accounting practices.
    … and desirable changes in cost accounting practices. (b) Procedures. Upon receipt of the contractor's notification and description of the change in cost accounting practice, the CFAO should review the proposed change concurrently for adequ…
  • FAR 31.103 Contracts with commercial organizations.
    This category includes all contracts and contract modifications for supplies, services, or experimental, developmental, or research work negotiated with organizations other than educational institutions (see 31.104), construction and archit…
  • FAR 31.105 Construction and architect-engineer contracts.
    (a) This category includes all contracts and contract modifications negotiated on the basis of cost with organizations other than educational institutions (see 31.104), State and local governments (see 31.107), and nonprofit organizations e…
  • FAR 32.005 Consideration for contract financing.
    (a) Requirement. When a contract financing clause is included at the inception of a contract, there shall be no separate consideration for the contract financing clause. The value of the contract financing to the contractor is expected to b…
  • FAR 32.206 Solicitation provisions and contract clauses.
    (a) The contract shall contain the paragraph entitled “Payment” of the clause at 52.212-4, Contract Terms and Conditions—Commercial Products and Commercial Services. If the contract will provide for contract financing, the contracting offic…
  • FAR 36.214 Special procedures for price negotiation in construction contracting.
    …the policies and procedures in part 15 when negotiating prices for construction. (b) The contracting officer shall evaluate proposals and associated certified cost or pricing data and data other than certified cost or pricing data and shal…
  • FAR 42.302 Contract administration functions.
    (a) The contracting officer normally delegates the following contract administration functions to a CAO. The contracting officer may retain any of these functions, except those in paragraphs (a)(5), (a)(9), (a)(11), and (a)(12) of this sect…
  • FAR 42.505 Postaward subcontractor conferences.
    (a) The prime contractor is generally responsible for conducting postaward conferences with subcontractors. However, the prime contractor may invite Government representatives to a conference with subcontractors, or the Government may reque…
  • FAR 43.103 Types of contract modifications.
    Contract modifications are of the following types: (a) Bilateral. A bilateral modification (supplemental agreement) is a contract modification that is signed by the contractor and the contracting officer. Bilateral modifications are used t…
  • FAR 43.107 Contract clause.
    The contracting officer may insert a clause substantially the same as the clause at 52.243-7, Notification of Changes, in solicitations and contracts. The clause is available for use primarily in negotiated research and development or suppl…
  • FAR 43.205 Contract clauses.
    (a)(1) The contracting officer shall insert the clause at 52.243-1, Changes—Fixed-Price, in solicitations and contracts when a fixed-price contract for supplies is contemplated. (2) If the requirement is for services, other than architect-…
  • FAR 46.104 Contract administration office responsibilities.
    When a contract is assigned for administration to the contract administration office cognizant of the contractor's plant, that office, unless specified otherwise, shall— (a) Develop and apply efficient procedures for performing Government …
  • FAR 46.105 Contractor responsibilities.
    (a) The contractor is responsible for carrying out its obligations under the contract by— (1) Controlling the quality of supplies or services; (2) Tendering to the Government for acceptance only those supplies or services that conform to …
  • FAR 52.204-10 Reporting Executive Compensation and First-Tier Subcontract Awards.
    …1403(a), insert the following clause: Reporting Executive Compensation and First-Tier Subcontract Awards (JUN 2020) (a) Definitions. As used in this clause: Executive means officers, managing partners, or any other employees in managemen…
  • FAR 52.204-28 Federal Acquisition Supply Chain Security Act Orders—Federal Supply Schedules, Governmentwide Acquisition Contracts, and Multi-Agency Contracts.
    …ion Supply Chain Security Act Orders—Federal Supply Schedules, Governmentwide Acquisition Contracts, and Multi-Agency Contracts (DEC 2023) (a) Definitions. As used in this clause— Covered article, as defined in 41 U.S.C. 4713(k), means— …
  • FAR 52.209-3 First Article Approval—Contractor Testing.
    …s prescribed in 9.308-1 (a) and (b), insert the following clause: First Article Approval—Contractor Testing (SEP 1989) [Contracting Officer shall insert details] (a) The Contractor shall test __ unit(s) of Lot/Item __ as specified in thi…
  • FAR 52.212-4 Contract Terms and Conditions—Commercial Products and Commercial Services.
    As prescribed in 12.301(b)(3), insert the following clause: Contract Terms and Conditions—Commercial Products and Commercial Services (NOV 2023) (a) Inspection/Acceptance. The Contractor shall only tender for acceptance those items that c…
  • FAR 52.215-9 Changes or Additions to Make-or-Buy Program.
    …rt the following clause: Changes or Additions to Make-or-Buy Program (OCT 1997) (a) The Contractor shall perform in accordance with the make-or-buy program incorporated in this contract. If the Contractor proposes to change the program, t…
  • FAR 52.215-19 Notification of Ownership Changes.
    …8(k), insert the following clause: Notification of Ownership Changes (OCT 1997) (a) The Contractor shall make the following notifications in writing: (1) When the Contractor becomes aware that a change in its ownership has occurred, or i…
  • FAR 52.219-9 Small Business Subcontracting Plan.
    As prescribed in 19.708(b), insert the following clause: Small Business Subcontracting Plan (JAN 2025) (a) This clause does not apply to small business concerns. (b) Definitions. As used in this clause— Alaska Native Corporation (ANC) m…
  • FAR 52.222-55 Minimum Wages for Contractor Workers Under Executive Order 14026.
    As prescribed in 22.1906, insert the following clause: Minimum Wages for Contractor Workers Under Executive Order 14026 (JAN 2022) (a) Definitions. As used in this clause— “United States” means the 50 states, the District of Columbia, Pu…
  • FAR 52.225-19 Contractor Personnel in a Designated Operational Area or Supporting a Diplomatic or Consular Mission Outside the United States.
    As prescribed in 25.301-4, insert the following clause: Contractor Personnel in a Designated Operational Area or Supporting a Diplomatic or Consular Mission Outside the United States (MAY 2020) (a) Definitions. As used in this clause— Ch…
  • FAR 52.227-11 Patent Rights—Ownership by the Contractor.
    … prescribed in 27.303(b)(1), insert the following clause: Patent Rights—Ownership by the Contractor (MAY 2014) (a) As used in this clause— Invention means any invention or discovery that is or may be patentable or otherwise protectable u…
  • FAR 52.232-5 Payments Under Fixed-Price Construction Contracts.
    …ed in 32.111(a)(5), insert the following clause: Payments Under Fixed-Price Construction Contracts (MAY 2014) (a) Payment of price. The Government shall pay the Contractor the contract price as provided in this contract. (b) Progress pay…
  • FAR 52.232-10 Payments Under Fixed-Price Architect-Engineer Contracts.
    …32.111(c)(1), insert the following clause: Payments Under Fixed-Price Architect-Engineer Contracts (APR 2010) (a) Estimates shall be made monthly of the amount and value of the work and services performed by the Contractor under this cont…

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.