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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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148 sections with “modify”: the first 40

  • FAR 52.104 Procedures for modifying and completing provisions and clauses.
    (a) The contracting officer must not modify provisions and clauses unless the FAR authorizes their modification. For example— (1) “The contracting officer may use a period shorter than 60 days (but not less than 30 days) in paragraph (x) o…
  • FAR 19.502-9 Withdrawing or modifying small business set-asides.
    …ned, see 19.402(a)) stating the reasons. In a similar manner, the contracting officer may modify a unilateral or joint class small business set-aside to withdraw one or more individual acquisitions. (b) If the agency small business special…
  • FAR 13.302-3 Obtaining contractor acceptance and modifying purchase orders.
    (a) When it is desired to consummate a binding contract between the parties before the contractor undertakes performance, the contracting officer shall require written (see 2.101) acceptance of the purchase order by the contractor. (b) Eac…
  • DFARS 213.302-3 Obtaining contractor acceptance and modifying purchase orders.
    (1) Require written acceptance of purchase 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 agr…
  • FAR 22.404-6 Modifications of wage determinations.
    (a) General. (1) The Department of Labor may modify a wage determination to make it current by specifying only the items being changed or by reissuing the entire determination with changes incorporated. (2) All project wage determination m…
  • DFARS 227.7103-7 Use and nondisclosure agreement.
    … (1) The specific conditions under which an intended recipient will be authorized to use, modify, reproduce, release, perform, display, or disclose technical data subject to limited rights or SBIR/STTR data rights, or computer software subj…
  • DFARS 252.227-7013 Rights in Technical Data—Other Than Commercial Products and Commercial Services.
    …overnment purposes include competitive procurement, but do not include the rights to use, modify, reproduce, release, perform, display, or disclose technical data for commercial purposes or authorize others to do so. Government purpose rig…
  • DFARS 252.227-7014 Rights in Other Than Commercial Computer Software and Other Than Commercial Computer Software Documentation.
    …overnment purposes include competitive procurement, but do not include the rights to use, modify, reproduce, release, perform, display, or disclose computer software or computer software documentation for commercial purposes or authorize ot…
  • 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.
    …overnment purposes include competitive procurement, but do not include the rights to use, modify, reproduce, release, perform, display, or disclose technical data or computer software for commercial purposes or authorize others to do so. G…
  • DFARS 252.227-7025 Limitations on the Use or Disclosure of Government-Furnished Information Marked with Restrictive Legends.
    …ights, restricted rights, or SBIR/STTR data rights legends. (i) The Contractor shall use, modify, reproduce, perform, or display technical data received from the Government with limited rights legends, computer software received with restri…
  • FAR 32.908 Contract clauses.
    …itect-Engineer Contracts. (1) As authorized in 32.904(c)(2), the contracting officer may modify the date in paragraph (a)(4)(i) of the clause to specify a period longer than 7 days for constructive acceptance or constructive approval, if r…
  • DFARS 252.227-7015 Technical Data—Commercial Products and Commercial Services.
    … STTR program. (c) License. (1) The Government shall have the unrestricted right to use, modify, reproduce, release, perform, display, or disclose technical data, and to permit others to do so, that— (i) Have been provided to the Governme…
  • DFARS 252.227-7019 Validation of Asserted Restrictions—Computer Software.
    …t to justify the validity of any asserted restrictions on the Government's rights to use, modify, reproduce, perform, display, release, or disclose computer software delivered, required to be delivered, or otherwise provided to the Governme…
  • DFARS 252.227-7038 Patent Rights—Ownership by the Contractor (Large Business).
    …ntractor's business to which the invention pertains. (ii) The agency— (A) May revoke or modify the Contractor's domestic license to the extent necessary to achieve expeditious practical application of the subject invention pursuant to an …
  • FAR 4.2304 Procedures.
    …a newly issued applicable FASCSA order, then the agency awarding the basic contract shall modify the basic contract to remove any covered article, or any products or services produced or provided by a source, prohibited by the newly issued …
  • FAR 14.407-3 Other mistakes disclosed before award.
    … the contracting officer shall advise the bidder to make a written request to withdraw or modify the bid. The request must be supported by statements (sworn statements, if possible) and shall include all pertinent evidence such as the bidde…
  • FAR 16.203-4 Contract clauses.
    …his does not apply to prompt payment or cash discounts.) (4) The contracting officer may modify the clause by increasing the 10 percent limit on aggregate increases specified in 52.216-2(c)(1), upon approval by the chief of the contracting…
  • DFARS 219.7103-2 Contracting officer responsibilities.
    …e authority to negotiate to the administrative contracting officer (see FAR 31.109). (b) Modify (without consideration) applicable contract(s) to incorporate the clause at 252.232-7005, Reimbursement of Subcontractor Advance Payments—DoD M…
  • DFARS 252.227-7016 Rights in Bid or Proposal Information.
    …agraphs (c)(2), (d), and (e) of this clause, the Government shall have the rights to use, modify, reproduce, release, perform, display, or disclose information contained in the Contractor's bid or proposal within the Government. The Governm…
  • FAR 9.407-3 Procedures.
    …roceedings with respect to disputed facts. (3) The suspending and debarring official may modify or terminate the suspension or leave it in force (for example, see 9.406-4(c) for the reasons for reducing the period or extent of debarment). …
  • FAR 15.408 Solicitation provisions and contract clauses.
    …ion with a prime contract entered into before July 1, 2018, the contracting officer shall modify the contract without requiring consideration, to replace clause 52.215-12, Subcontractor Certified Cost or Pricing Data, with its Alternate I. …
  • FAR 16.506 Solicitation provisions and contract clauses.
    …icitations for indefinite-quantity contracts that may result in multiple contract awards. Modify the provision to specify the estimated number of awards. Do not use this provision for advisory and assistance services contracts that exceed 3…
  • FAR 16.702 Basic agreements.
    … review due to mandatory statutory requirements. A basic agreement may be changed only by modifying the agreement itself and not by a contract incorporating the agreement. (4) Discontinuing or modifying a basic agreement shall not affect a…
  • FAR 16.703 Basic ordering agreements.
    … to mandatory statutory requirements. A basic ordering agreement shall be changed only by modifying the agreement itself and not by individual orders issued under it. Modifying a basic ordering agreement shall not retroactively affect order…
  • FAR 17.602 Policy.
    …tual arrangements in the light of the guidance of this subpart, in order to (1) identify, modify as necessary, and authorize management and operating contracts and (2) modify as necessary or terminate contracts not so identified and authori…
  • FAR 22.404-5 Expiration of project wage determinations.
    …mination. If the request is granted, the contracting officer shall award the contract and modify it to apply the extended expiration date to the already incorporated project wage determination. (See 43.103(b)(1).) If the request is denied, …
  • FAR 27.303 Contract clauses.
    …nless otherwise specified by agency supplemental regulations, the contracting officer may modify 52.227-11(e) or otherwise supplement the clause to require the contractor to do one or more of the following: (i) Provide periodic (but not mo…
  • FAR 27.304-1 General.
    …2-204. (f) Revocation or modification of contractor's minimum rights. Before revoking or modifying the contractor's license in accordance with 27.302(i)(2), the contracting officer shall furnish the contractor a written notice of intention…
  • FAR 48.104-2 Sharing acquisition savings.
    …o reflect price reductions attributable to use of the VECP, the contracting officer shall modify the instant contract to provide the contractor's share of savings. (6) The contractor's share of future contract savings may be paid as subseq…
  • FAR 48.201 Clauses for supply or service contracts.
    …ining low-rate-initial-production or early production units, the contracting officer must modify the clause at 52.248-1, Value Engineering, by— (1) Revising paragraph (i)(3)(i) of the clause by substituting “a number equal to the quantity …
  • FAR 50.101-1 Authority.
    …es exercising functions in connection with the national defense to enter into, amend, and modify contracts, without regard to other provisions of law related to making, performing, amending, or modifying contracts, whenever the President co…
  • FAR 52.214-28 Subcontractor Certified Cost or Pricing Data—Modifications—Sealed Bidding.
    … data, and the nature and amount of any contingencies included in the price)— (1) Before modifying any subcontract that was awarded prior to July 1, 2018, involving a pricing adjustment expected to exceed $950,000; or (2) Before awarding …
  • FAR 52.215-12 Subcontractor Certified Cost or Pricing Data.
    … data, and the nature and amount of any contingencies included in the price)— (1) Before modifying any subcontract that was awarded prior to July 1, 2018, involving a pricing adjustment expected to exceed $950,000; or (2) Before awarding …
  • FAR 52.215-13 Subcontractor Certified Cost or Pricing Data—Modifications.
    … data, and the nature and amount of any contingencies included in the price)— (1) Before modifying any subcontract that was awarded prior to July 1, 2018, involving a pricing adjustment expected to exceed $950,000; or (2) Before modifying…
  • FAR 52.243-1 Changes—Fixed-Price.
    … an equitable adjustment in the contract price, the delivery schedule, or both, and shall modify the contract. (c) The Contractor must assert its right to an adjustment under this clause within 30 days from the date of receipt of the writt…
  • FAR 53.243 Contract modifications (SF 30).
    …act. SF 30 is prescribed for use in amending invitation for bids, as specified in 14.208; modifying purchase and delivery orders, as specified in 13.302-3; and modifying contracts, as specified in 42.1203(h), 43.301, 49.602-5, and elsewhere…
  • DFARS 227.7103-4 License rights.
    …s (see 227.7103-5(a)(2) and (a)(4) through (9)), restrict the Government's rights to use, modify, release, reproduce, perform, display or disclose technical data pertaining to items, components, or processes developed exclusively at private…
  • DFARS 227.7203-2 Acquisition of other than commercial computer software and computer software documentation and associated rights.
    … (iv) Whether the Government's software maintenance philosophy will require the right to modify or have third parties modify the software; and (v) Any special computer software documentation requirements. (2)(i) Procurement planning. To …
  • DFARS 227.7203-5 Government rights.
    …ifically negotiated license rights. Negotiate specific licenses when the parties agree to modify the standard license rights granted to the Government or when the Government wants to obtain rights in computer software in which it does not h…
  • DFARS 227.7203-13 Government right to review, verify, challenge, and validate asserted restrictions.
    …offeror's or contractor's assertion(s) of restrictions on the Government's rights to use, modify, reproduce, release, or disclose computer software or computer software documentation do not, by themselves, determine the extent of the Govern…

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.