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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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94 sections with “modification number”: the first 40

  • FAR 22.404-6 Modifications of wage determinations.
    …g the entire determination with changes incorporated. (2) All project wage determination modifications expire on the same day as the original determination. The need to include a modification of a project wage determination for the primary…
  • DFARS 204.7106 Contract modifications.
    …, in accordance with the procedures established at 204.7103, 204.7104, and 204.7105. (b) Modifications to existing contract line items or exhibit line items. (1) If the modification relates to existing contract line items or exhibit line i…
  • FAR 15.408 Solicitation provisions and contract clauses.
    …tractor (see 15.403-4). (c) Price Reduction for Defective Certified Cost or Pricing Data—Modifications. The contracting officer shall, when contracting by negotiation, insert the clause at 52.215-11, Price Reduction for Defective Certified…
  • FAR 2.101 Definitions.
    …atisfy a criterion expressed in paragraph (1) or (2) of this definition, except for— (i) Modifications of a type customarily available in the commercial marketplace; or (ii) Minor modifications of a type not customarily available in the c…
  • FAR 4.1006 Modifications.
    …ntity) is added to the procurement instrument, assign a new line item number. (b) If the modification relates to existing line items, the modification shall refer to those items.
  • FAR 4.1603 Procedures.
    …upplementary PIID. Use the supplementary PIID to identify amendments to solicitations and modifications to contracts, orders, and agreements. The supplementary PIID is reported as a separate data element used in conjunction with, but not ap…
  • FAR 13.302-3 Obtaining contractor acceptance and modifying purchase orders.
    … (see 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 pu…
  • FAR 16.702 Basic agreements.
    … basic agreement. (3) If an existing contract is modified to effect new acquisition, the modification shall incorporate the most recent basic agreement, which shall apply only to work added by the modification, except that this action is n…
  • FAR 22.1012-1 Prevailing wage determinations.
    …lusion of a revised prevailing wage determination in a solicitation, contract or contract modification (see 22.1007) is determined by the date of receipt of the revised prevailing wage determination by the contracting agency. (Note the dist…
  • FAR 52.215-1 Instructions to Offerors—Competitive Acquisition.
    …r communicated, and includes electronically transmitted and stored information. Proposal modification is a change made to a proposal before the solicitation's closing date and time, or made in response to an amendment, or made to correct a…
  • FAR 52.216-5 Price Redetermination—Prospective.
    …formed in the period following the effective date of price redetermination. (f) Contract modifications. Each negotiated redetermination of prices shall be evidenced by a modification to this contract, signed by the Contractor and the Contr…
  • FAR 52.216-6 Price Redetermination—Retroactive.
    …ies delivered and services performed by the Contractor under this contract. (e) Contract modification. The negotiated redetermination of price shall be evidenced by a modification to this contract, signed by the Contractor and the Contract…
  • FAR 52.216-16 Incentive Price Revision—Firm Target.
    …ice revision in accordance with the terms of this clause shall be identified as such in a modification to this contract. (b) Definition. Costs, as used in this clause, means allowable costs in accordance with part 31 of the Federal Acquisi…
  • FAR 52.216-17 Incentive Price Revision—Successive Targets.
    …subject to price revision in accordance with this clause shall be identified as such in a modification to this contract. (b) Definition. Costs, as used in this clause, means allowable costs in accordance with part 31 of the Federal Acquisi…
  • FAR 52.219-9 Small Business Subcontracting Plan.
    … contract. (i) A contract may have no more than one subcontracting plan. When a contract modification exceeds the subcontracting plan threshold in FAR 19.702(a), or an option is exercised, the goals of the existing subcontracting plan shal…
  • FAR 52.248-1 Value Engineering.
    …include savings on increases in quantities after VECP acceptance that are due to contract modifications, exercise of options, additional orders, and funding of subsequent year requirements on a multiyear contract. Collateral costs, as used…
  • FAR 52.248-3 Value Engineering—Construction.
    … have on collateral costs to the agency. (6) A statement of the time by which a contract modification accepting the VECP must be issued in order to achieve the maximum cost reduction, noting any effect on the contract completion time or de…
  • DFARS 204.1603 Procedures.
    … FAR 4.1603(b)(2)(ii), DoD-issued supplementary PIIDs shall, for positions 2 through 6 of modifications to contracts and agreements, comply with the following: (1) Positions 2 and 3. These two digits may be either alpha or numeric characte…
  • DFARS 205.303 Announcement of contract awards.
    …(i) The threshold for DoD awards is $9 million. Report all contractual actions, including modifications, that have a face value, excluding unexercised options, of more than $9 million. (A) For undefinitized contractual actions, report the …
  • DFARS 227.7103-7 Use and nondisclosure agreement.
    …technical data or computer software delivered to the Government with restrictions on use, modification, reproduction, release, performance, display, or disclosure may not be provided to third parties, unless the intended recipient completes…
  • DFARS 234.7002 Policy.
    …ms of major weapon systems that are acquired by DoD through a— (i) Prime contract; (ii) Modification to a prime contract; or (iii) Subcontract under a prime contract for the acquisition of a subsystem proposed as a commercial product tha…
  • DFARS 252.215-7010 Requirements for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data.
    …aragraph (3)(i) of the “commercial product” definition at FAR 2.101, a description of the modification and documentation to support that the modification is customarily available in the marketplace; or (ii) For products under paragraph (3)…
  • DFARS 252.227-7014 Rights in Other Than Commercial Computer Software and Other Than Commercial Computer Software Documentation.
    …n expressed in paragraph (1), (2), or (3) of this definition and would require only minor modification to meet the requirements of this contract. Computer database means a collection of recorded data in a form capable of being processed by…
  • DFARS 252.227-7018 Rights in Other Than Commercial Technical Data and Computer Software—Small Business Innovation Research Program and Small Business Technology Transfer Program.
    …n expressed in paragraph (1), (2), or (3) of this definition and would require only minor modification to meet the requirements of this contract. Computer database means a collection of recorded data in a form capable of being processed by…
  • FAR 14.303 Modification or withdrawal of bids.
    … of bids, subject to the conditions specified in the provision prescribed in 14.201-6(v). Modifications received by facsimile shall be sealed in an envelope by a proper official. (1) The official shall— (i) Write on the envelope— (A) The…
  • FAR 22.1012-2 Wage determinations based on collective bargaining agreements.
    … agreement is received by the contracting agency after award of a successor contract or a modification as specified in 22.1007(b), provided that the contract start of performance is within 30 days of the award of the contract or of the spec…
  • FAR 49.109-6 Joint settlement of two or more settlement proposals.
    …e contract, it shall (1) clearly identify the contracts involved, (2) assign an amendment modification number to each contract, (3) apportion the total amount of the settlement among the several contracts on some reasonable basis, (4) have …
  • FAR 52.204-30 Federal Acquisition Supply Chain Security Act Orders—Prohibition.
    …olicitation applies to this contract only if added by an amendment to the solicitation or modification to the contract (see FAR 4.2304(c)). However, see paragraph (c) of this clause. (5)(i) If the contractor wishes to ask for a waiver of t…
  • FAR 52.212-1 Instructions to Offerors—Commercial Products and Commercial Services.
    …s solicitation. Each offer submitted will be evaluated separately. (f) Late submissions, modifications, revisions, and withdrawals of offers. (1) Offerors are responsible for submitting offers, and any modifications, revisions, or withdraw…
  • FAR 52.245-1 Government Property.
    …ut is not limited to, spares and property furnished for repair, maintenance, overhaul, or modification. Government-furnished property also includes contractor-acquired property if the contractor-acquired property is a deliverable under a co…
  • FAR 4.804-5 Procedures for closing out contract files.
    …acting office). (2) Contracting office name and address. (3) Contract number. (4) Last modification number. (5) Last call or order number. (6) Contractor name and address. (7) Dollar amount of excess funds, if any. (8) Voucher number…
  • FAR 4.1601 Policy.
    …ed. In this instance, the contracting officer may assign a new PIID by issuing a contract modification. (ii) Continued use of a PIID is administratively burdensome (e.g., for implementations of new agency contract writing systems). In this…
  • FAR 42.1204 Applicability of novation agreements.
    … contracts and purchase orders and all other contracts and purchase orders, including all modifications, made between the Government and the Transferor before the effective date of this Agreement (whether or not performance and payment have…
  • FAR 52.216-3 Economic Price Adjustment—Semistandard Supplies.
    …ine items ____ [offeror insert Schedule line item number] in the Schedule are, except for modifications required by the contract specifications, supplies for which it has an established price. The term established price means a price that (…
  • FAR 52.227-14 Rights in Data—General.
    … pertain to items, components, or processes developed at private expense, including minor modifications. Restricted computer software means computer software developed at private expense and that is a trade secret, is commercial or financi…
  • DFARS 204.7103-1 Criteria for establishing.
    …ferent authorizations or appropriations, such as in the acquisition of a satellite or the modification of production tooling used to produce items being acquired by several activities; or (C) A modification to an existing contract line ite…
  • DFARS 252.204-7012 Safeguarding Covered Defense Information and Cyber Incident Reporting.
    …rate with the consequences and probability of loss, misuse, or unauthorized access to, or modification of information. Compromise means disclosure of information to unauthorized persons, or a violation of the security policy of a system, i…
  • FAR 5.404-1 Release procedures.
    … estimate is based on the best information available; (ii) The information is subject to modification and is in no way binding on the Government; and (iii) More specific information relating to any individual item or class of items will n…
  • FAR 15.203 Requests for proposals.
    …performance. (c) Electronic commerce may be used to issue RFPs and to receive proposals, modifications, and revisions. In this case, the RFP shall specify the electronic commerce method(s) that offerors may use (see subpart 4.5). (d) Cont…
  • FAR 15.404-4 Profit.
    …or fee objective but may consider it, if it is submitted voluntarily. (6) If a change or modification calls for essentially the same type and mix of work as the basic contract and is of relatively small dollar value compared to the total c…

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.