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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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498 sections with “change”: the first 40

  • FAR 15.201 Exchanges with industry before receipt of proposals.
    (a) Exchanges of information among all interested parties, from the earliest identification of a requirement through receipt of proposals, are encouraged. Any exchange of information must be consistent with procurement integrity requirement…
  • FAR 15.306 Exchanges with offerors after receipt of proposals.
    (a) Clarifications and award without discussions. (1) Clarifications are limited exchanges, between the Government and offerors, that may occur when award without discussions is contemplated. (2) If award will be made without conducting di…
  • 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.
    (a) Scope. This section applies to required, unilateral, 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 …
  • FAR 41.402 Rate changes and regulatory intervention.
    (a) When a change is proposed to rates or terms and conditions of service to the Government, the agency shall promptly determine whether the proposed change is reasonable, justified, and not discriminatory. (b) If a change is proposed to r…
  • FAR 42.1205 Agreement to recognize contractor's change of name.
    (a) If only a change of the contractor's name is involved and the Government's and contractor's rights and obligations remain unaffected, the parties shall execute an agreement to reflect the name change. The contractor shall forward to the…
  • 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…
  • FAR 52.215-9 Changes or Additions to Make-or-Buy Program.
    As prescribed in 15.408(a), insert 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 p…
  • FAR 52.215-19 Notification of Ownership Changes.
    As prescribed in 15.408(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 owners…
  • FAR 52.230-7 Proposal Disclosure—Cost Accounting Practice Changes.
    …0.201-3(c), insert the following provision: Proposal Disclosure—Cost Accounting Practice Changes (APR 2005) The offeror shall check “yes” below if the contract award will result in a required or unilateral change in cost accounting practi…
  • FAR 52.241-7 Change in Rates or Terms and Conditions of Service for Regulated Services.
    As prescribed in 41.501(d)(1), insert a clause substantially the same as the following: Change in Rates or Terms and Conditions of Service for Regulated Services (FEB 1995) (a) This clause applies to the extent services furnished under th…
  • FAR 52.241-8 Change in Rates or Terms and Conditions of Service for Unregulated Services.
    As prescribed in 41.501(d)(2), insert a clause substantially the same as the following: Change in Rates or Terms and Conditions of Service for Unregulated Services (FEB 1995) (a) This clause applies to the extent that services furnished h…
  • FAR 52.243-1 Changes—Fixed-Price.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes—Fixed-Price (AUG 1987) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make change…
  • FAR 52.243-2 Changes—Cost-Reimbursement.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes—Cost-Reimbursement (AUG 1987) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make…
  • FAR 52.243-3 Changes—Time-and-Materials or Labor-Hours.
    As prescribed in 43.205(c), insert the following clause: Changes—Time-and-Materials or Labor-Hours (SEP 2000) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make changes within t…
  • FAR 52.243-4 Changes.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes (JUN 2007) (a) The Contracting Officer may, at any time, without notice to the sureties, if any, by written order designated or indicated to …
  • FAR 52.243-6 Change Order Accounting.
    ….205(f), the contracting officer may insert a clause, substantially the same as follows: Change Order Accounting (APR 1984) The Contracting Officer may require change order accounting whenever the estimated cost of a change or series of r…
  • FAR 52.243-7 Notification of Changes.
    As prescribed in 43.107, insert the following clause: Notification of Changes (JAN 2017) (a) Definitions. Contracting Officer, as used in this clause, does not include any representative of the Contracting Officer. Specifically Authoriz…
  • DFARS 252.217-7003 Changes.
    As prescribed in 217.7104(a), use the following clause: Changes (DEC 1991) (a) The Contracting Officer may, at any time and without notice to the sureties, by written change order, make changes within the general scope of any job order is…
  • FAR 8.712 Specification changes.
    …AbilityOne participating nonprofit agency and appropriate central nonprofit agency of any change in specifications or descriptions. In the absence of such written notification, the AbilityOneparticipating nonprofit agency shall furnish the …
  • FAR 43.203 Change order accounting procedures.
    … Contractors' accounting systems are seldom designed to segregate the costs of performing changed work. Therefore, before prospective contractors submit offers, the contracting officer should advise them of the possible need to revise their…
  • FAR 49.114 Unsettled contract changes.
    …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 after obtaining the recommendations of the contracting offi…
  • FAR 52.243-5 Changes and Changed Conditions.
    As prescribed in 43.205(e), insert the following clause: Changes and Changed Conditions (APR 1984) (a) The Contracting Officer may, in writing, order changes in the drawings and specifications within the general scope of the contract. (b…
  • FAR 8.716 Change-of-name and successor in interest procedures.
    When the Committee recognizes a name change or a successor in interest for an AbilityOneparticipating nonprofit agency providing supplies or services on the Procurement List— (a) The Committee will provide a notice of a change to the Procu…
  • FAR 28.302 Notice of cancellation or change.
    …nce coverage, the policies shall contain an endorsement that any cancellation or material change in the coverage adversely affecting the Government's interest shall not be effective unless the insurer or the contractor gives written notice …
  • DFARS 252.223-7003 Change in place of performance—ammunition and explosives.
    As prescribed in 223.370-5, use the following clause: Change in Place of Performance—Ammunition and Explosives (DEC 1991) (a) The Offeror shall identify, in the “Place of Performance” provision of this solicitation, the place of performan…
  • FAR 5.405 Exchange of acquisition information.
    …by more than one agency, or by more than one contracting activity within an agency, the exchange and coordination of pertinent information, particularly cost and pricing data, between these agencies or contracting activities is necessary to…
  • FAR 9.207 Changes in status regarding qualification requirements.
    …ted for inspection or acceptance; (3) A supplier fails to request reevaluation following change of location or ownership of the plant where the product which met the qualification requirement was manufactured (see the clause at 52.209-1, Q…
  • FAR 52.241-4 Change in Class of Service.
    As prescribed in 41.501(c)(3), insert a clause substantially the same as the following: Change in Class of Service (FEB 1995) (a) In the event of a change in the class of service, such service shall be provided at the Contractor's lowest …
  • DFARS 227.676 Foreign patent interchange agreements.
    (a) Patent interchange agreements between the United States and foreign governments provide for the use of patent rights, compensation, free licenses, and the establishment of committees to review and make recommendations on these matters. …
  • DFARS 252.217-7002 Offering property for exchange.
    As prescribed in 217.7005, use the following provision: Offering Property for Exchange (JUN 2012) (a) The property described in item number ________, is being offered in accordance with the exchange provisions of 40 U.S.C. 503. (b) The p…
  • FAR 18.107 AbilityOne specification changes.
    Contracting officers are not held to the notification required when changes in AbilityOne specifications or descriptions are required to meet emergency needs. (See 8.712(d).)
  • FAR 19.502-11 Solicitation notice regarding administration of change orders for construction.
    …ent to provide a notice to offerors regarding definitization of equitable adjustments for change orders under construction contracts.
  • FAR 43.202 Authority to issue change orders.
    Change orders shall be issued by the contracting officer except when authority is delegated to an administrative contracting officer (see 42.202(c)).
  • FAR 45.604-4 Sale of property pursuant to the exchange/sale authority.
    Agencies should consider the sale of property pursuant to the exchange/sale authority in FMR 102-39 (41 CFR part 102-39) when agencies are acquiring or plan to acquire similar products and other requirements of the authority are satisfied.
  • FAR 53.242-1 Novation and change-of-name agreements (SF 30).
    …n of Contract. SF 30, prescribed in 53.243, shall be used in connection with novation and change of name agreements, as specified in 42.1203(h).
  • DFARS 243.205-72 Unpriced change orders.
    See the clause prescriptions at 217.7406 for all unpriced change orders with an estimated value exceeding $5 million.
  • FAR 30.603 Changes to disclosed or established cost accounting practices.
  • FAR 48.103 Processing value engineering change proposals.
    (a) Instructions to the contractor for preparing a VECP and submitting it to the Government are included in paragraphs (c) and (d) of the value engineering clauses prescribed in subpart 48.2. Upon receiving a VECP, the contracting officer o…

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.