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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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30 sections with “bid modifications”

  • FAR 52.214-7 Late submissions, modifications, and withdrawals of bids.
    …(3), insert the following provision: Late Submissions, Modifications, and Withdrawals of Bids (NOV 1999) (a) Bidders are responsible for submitting bids, and any modifications or withdrawals, so as to reach the Government office designate…
  • FAR 52.214-23 Late submissions, modifications, revisions, and withdrawals of technical proposals under two-step sealed bidding.
    …s, Modifications, Revisions, and Withdrawals of Technical Proposals Under Two-Step Sealed Bidding (NOV 1999) (a) Bidders are responsible for submitting technical proposals, and any modifications or revisions, so as to reach the Government …
  • FAR 52.214-5 Submission of Bids.
    As prescribed in 14.201-6(c)(1), insert the following provision: Submission of Bids (DEC 2016) (a) Bids and bid modifications shall be submitted in sealed envelopes or packages (unless submitted by electronic means) (1) addressed to the o…
  • FAR 14.303 Modification or withdrawal of bids.
    (a) Bids may be modified or withdrawn by any method authorized by the solicitation, if notice is received in the office designated in the solicitation not later than the exact time set for opening of bids. If the solicitation authorizes fac…
  • FAR 14.304 Submission, modification, and withdrawal of bids.
    (a) Bidders are responsible for submitting bids, and any modifications or withdrawals, so as to reach the Government office designated in the invitation for bid (IFB) by the time specified in the IFB. They may use any transmission method au…
  • FAR 14.401 Receipt and safeguarding of bids.
    (a) All bids (including modifications) received before the time set for the opening of bids shall be kept secure. Except as provided in paragraph (b) of this section, the bids shall not be opened or viewed, and shall remain in a locked bid …
  • FAR 22.404-6 Modifications of wage determinations.
    … SAM.gov website's “Alert Service”. (b) The following applies when contracting by sealed bidding: (1) A written action modifying a wage determination shall be effective if: (i) It is received by the contracting agency, or is published on…
  • FAR 52.214-20 Bid Samples.
    As prescribed in 14.201-6(o)(1), insert the following provision: Bid Samples (APR 2002) (a) Bid sample means a product sample required to be submitted by a bidder to show those characteristics of the offered products that cannot adequatel…
  • FAR 31.205-18 Independent research and development and bid and proposal costs.
    …ition of the term development, defined in this subsection. Basic research, (See 2.101). Bid and proposal (B&P) costs means the costs incurred in preparing, submitting, and supporting bids and proposals (whether or not solicited) on potent…
  • FAR 52.214-27 Price Reduction for Defective Certified Cost or Pricing Data—Modifications—Sealed Bidding.
    …lause: Price Reduction for Defective Certified Cost or Pricing Data—Modifications—Sealed Bidding (JUN 2020) (a) This clause shall become operative only for any modification to this contract involving aggregate increases and/or decreases i…
  • FAR 52.214-28 Subcontractor Certified Cost or Pricing Data—Modifications—Sealed Bidding.
    … the following clause: Subcontractor Certified Cost or Pricing Data—Modifications—Sealed Bidding (JUN 2020) (a) The requirements of paragraphs (b) and (c) of this clause shall (1) Become operative only for any modification to this contra…
  • FAR 2.101 Definitions.
    …ment's estimation, provides the greatest overall benefit in response to the requirement. Bid sample means a product sample required to be submitted by an offeror to show characteristics of the offered products that cannot adequately be des…
  • FAR 14.201-6 Solicitation provisions.
    (a) The provisions prescribed in this subsection apply to preparation and submission of bids in general. See other FAR parts for provisions and clauses related to specific acquisition requirements. (b) Insert in all invitations for bids th…
  • FAR 14.201-7 Contract clauses.
    (a) When contracting by sealed bidding, the contracting officer shall insert the clause at 52.214-26, Audit and Records-Sealed Bidding, in solicitations and contracts as follows: (1) Use the basic clause if— (i) The acquisition will not u…
  • FAR 19.702 Statutory requirements.
    …ssification System (NAICS) code, see paragraph (a)(2)(i) of this section. (ii) In sealed bidding acquisitions, each invitation for bids to perform a contract that is expected to exceed $900,000 ($2 million for construction) and that has su…
  • FAR 52.214-21 Descriptive Literature.
    … (a) Descriptive literature, as used in this provision, means information furnished by a bidder, such as cuts, illustrations, drawings, and brochures, that shows a product's characteristics or construction or explains its operation. The te…
  • FAR 53.243 Contract modifications (SF 30).
    …citation/Modification of Contract. 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), 4…
  • FAR 14.103-1 General.
    (a) Sealed bidding shall be used whenever the conditions in 6.401(a) are met. This requirement applies to any proposed contract action under part 6. (b) Sealed bidding may be used for classified acquisitions if its use does not violate age…
  • FAR 19.705-6 Postaward responsibilities of the contracting officer.
    … see 19.402(a)) a copy of— (1) Any subcontracting plan submitted in response to a sealed bid solicitation; and (2) The final negotiated subcontracting plan that was incorporated into a negotiated contract or contract modification. (d) No…
  • FAR 53.200 Scope of subpart.
    …orm usage requirements are addressed. For example, forms addressed in FAR part 14, Sealed Bidding, are treated in this subpart in section 53.214, Sealed Bidding; forms addressed in FAR part 43, Contract Modifications, are treated in this su…
  • FAR 4.803 Contents of contract files.
    …d record of any debriefing. (29) Acquisition management reports (see subpart 4.6). (30) Bid, performance, payment, or other bond documents, or a reference thereto, and notices to sureties. (31) Report of postaward conference. (32) Notic…
  • FAR 15.400 Scope of subpart.
    …racts) and contract modifications, including modifications to contracts awarded by sealed bidding.
  • FAR 15.403-4 Requiring certified cost or pricing data (10 U.S.C. chapter 271 and 41 U.S.C. chapter 35).
    …r pricing data (but see waivers at 15.403-1(c)(4)). (iii) The modification of any sealed bid or negotiated contract (whether or not certified cost or pricing data were initially required) or any subcontract covered by paragraph (a)(1)(ii) …
  • FAR 22.404-7 Correction of wage determinations containing clerical errors.
    …tracting officer must follow the procedures in 22.404-5(b)(1) or (2)(i) or (ii) in sealed bidding, and the procedures in 22.404-5(c)(3) or (4) in negotiations. After contract award, the contracting officer must follow the procedures at 22.4…
  • FAR 22.1802 Policy.
    (a) Statutes and Executive orders require employers to abide by the immigration laws of the United States and to employ in the United States only individuals who are eligible to work in the United States. The E-Verify program provides an In…
  • FAR 32.410 Findings, determination, and authorization.
    …t the name of the contractor] (have entered) (propose to enter) into (negotiated) (sealed bid) Contract No. ____, dated ______ [Summarize the specific facts and significant circumstances concerning the contract and the contractor, that, to…
  • FAR 42.1204 Applicability of novation agreements.
    … in performing the contract. (See 14.404-2(l) for the effect of novation agreements after bid opening but before award.) Examples of such transactions include, but are not limited to— (i) Sale of these assets with a provision for assuming …
  • FAR 47.200 Scope of subpart.
    (a) This subpart prescribes procedures for the acquisition by sealed bid or negotiated contracts of— (1) Freight transportation (including local drayage) from rail, motor (including bus), domestic water (including inland, coastwise, and in…
  • FAR 52.212-1 Instructions to Offerors—Commercial Products and Commercial Services.
    …rson signs a receipt for the offer. (g) Contract award (not applicable to Invitation for Bids). The Government intends to evaluate offers and award a contract without discussions with offerors. Therefore, the offeror's initial offer should…
  • FAR 52.227-14 Rights in Data—General.
    …0 days of receipt of the Contracting Officer's decision. The Government will continue to abide by the markings under this paragraph (e)(1)(iii) until final resolution of the matter either by the Contracting Officer's determination becoming …

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.