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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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124 sections with “response time”: the first 40

  • FAR 5.203 Publicizing and response time.
    …transmit a notice of proposed contract action to the GPE (see 5.201). All publicizing and response times are calculated based on the date of publication. The publication date is the date the notice appears on the GPE. The notice must be pub…
  • DFARS 205.203 Publicizing and response time.
    (b) Allow at least 45 days response time when requested by a qualifying or designated country source (as these terms are used in part 225) and the request is consistent with the Government's requirement. (S-70) When using competitive proce…
  • DFARS 227.7103-13 Government right to review, verify, challenge, and validate asserted restrictions.
    …t private expense whether or not a contractor or subcontractor submits a justification in response to a challenge notice. The contracting officer shall not challenge a contractor's assertion that a commercial product or commercial service w…
  • DFARS 227.7203-13 Government right to review, verify, challenge, and validate asserted restrictions.
    …ve that the contractor will not respond in a timely manner to a challenge and an untimely response would jeopardize a subcontractor's or supplier's right to assert restrictions; or (3) Requested to do so by a subcontractor or supplier. (d…
  • FAR 2.101 Definitions.
    …cquisition that, in the Government'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…
  • FAR 26.203 Transition of work.
    (a) In anticipation of potential emergency response requirements, agencies involved in response planning should consider awarding emergency response contracts before a major disaster or emergency occurs to ensure immediate response and reli…
  • FAR 52.215-1 Instructions to Offerors—Competitive Acquisition.
    …s 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 mistake at any time before award. Proposal revision is a change to a proposal made after the solicitat…
  • DFARS 252.227-7037 Validation of Asserted Restrictions on Technical Data.
    …nish to the Contracting Officer a written justification for such asserted restrictions in response to a challenge under paragraph (e) of this clause. (d) Prechallenge request for information. (1) The Contracting Officer may request the Con…
  • FAR 12.205 Offers.
    …cers should allow offerors to propose multiple offers that will meet a Government need in response to solicitations for commercial products or commercial services. The contracting officer shall evaluate each offer separately (c) Consistent…
  • FAR 12.603 Streamlined solicitation for commercial products or commercial services.
    …umber of the individual to contact for information regarding the solicitation. (3) Allow response time for receipt of offers as follows: (i) Because the synopsis and solicitation are contained in a single document, it is not necessary to …
  • FAR 42.801 Notice of intent to disallow costs.
    …the event of disagreement, the contractor may submit to the contracting officer a written response. Any such response shall be answered by withdrawal of the notice or by making a written decision within 60 days. (c) As a minimum, the notic…
  • DFARS 212.7004 Procedures.
    …method of evaluation; (4) Specify the period of time during which proposals submitted in response to the CSO will be accepted; and (5) Contain instructions for the preparation and submission of proposals. (b) The contracting officer shal…
  • DFARS 216.601 Time-and-materials contracts.
    …k; (iii) Facilitate the provision of international disaster assistance; or (iv) Support response to an emergency or major disaster. (B) Content of determination and findings. The determination and findings shall contain sufficient facts …
  • DFARS 252.227-7019 Validation of Asserted Restrictions—Computer Software.
    …nish to the Contracting Officer a written justification for such asserted restrictions in response to a request for information under paragraph (d) of this clause or a challenge under paragraph (f) of this clause. (c) Direct contact with s…
  • FAR 12.503 Applicability of certain laws to Executive agency contracts for the acquisition of commercial products and commercial services.
    …rans' Employment Reporting Requirements (see 22.1302). (3) 41 U.S.C. 1708(e)(3), Minimum Response Time for Offers (see 5.203). (4) 41 U.S.C. 2303(b), Policy on Personal Conflicts of Interest by Contractor Employees (see subpart 3.11). (5…
  • FAR 12.504 Applicability of certain laws to subcontracts for the acquisition of commercial products and commercial services.
    …Recovery and Reinvestment Act of 2009 (Pub. L. 111-5). (8) 41 U.S.C. 1708(e)(3), Minimum Response Time for Offers (see subpart 5.2). (9) 41 U.S.C. 2302, Rights in Technical Data (see subpart 27.4). (10) 41 U.S.C. chapter 81, Drug-Free Wo…
  • FAR 18.102 System for Award Management.
    … contractors are required to be registered in SAM in order to gain access to the Disaster Response Registry. (c) Contracting officers shall consult the Disaster Response Registry via https://www.sam.gov, Search Records, Advanced Search, Di…
  • FAR 25.408 Procedures.
    …the contracting officer must— (1) Comply with the requirements of 5.203, Publicizing and response time; (2) Comply with the requirements of 5.207, Preparation and transmittal of synopses; (3) Not include technical requirements in solicit…
  • FAR 4.2104 Waivers.
    …(2)(iii) and 4.2104(a)(2)(iv) to enable effective mission critical functions or emergency response and recovery. (ii) In the case of a waiver granted in response to an emergency, the head of an agency granting the waiver must— (A) Make a …
  • FAR 15.201 Exchanges with industry before receipt of proposals.
    … obtain price, delivery, other market information, or capabilities for planning purposes. Responses to these notices are not offers and cannot be accepted by the Government to form a binding contract. There is no required format for RFIs. …
  • FAR 15.207 Handling proposals and information.
    …eipt at the location specified in the solicitation, proposals and information received in response to a request for information (RFI) shall be marked with the date and time of receipt and shall be transmitted to the designated officials. (…
  • FAR 15.404-1 Proposal analysis techniques.
    …de, but are not limited to, the following: (i) Comparison of proposed prices received in response to the solicitation. Normally, adequate price competition establishes a fair and reasonable price (see 15.403-1(c)(1)). (ii) Comparison of t…
  • FAR 22.1012-1 Prevailing wage determinations.
    … of a new or revised prevailing wage determination from the Department of Labor as an e98 response. (2) In selecting a prevailing wage determination from the Wage Determinations at SAM.gov website for use in a solicitation or other contrac…
  • FAR 27.409 Solicitation provisions and contract clauses
    …(c)(2) and 27.404-2(d)(5), if the contracting officer desires to have an offeror state in response to a solicitation whether limited rights data or restricted computer software are likely to be used in meeting the data delivery requirements…
  • FAR 32.006-4 Procedures.
    … concerning the alleged fraud, including documentation submitted by the contractor in its response to the notice required by paragraph (e) of this subsection. (e) Before making a decision to reduce or suspend further payments, the agency h…
  • FAR 33.104 Protests to GAO.
    …ses the agency that the protest has been dismissed; or (B) Authorizes a longer period in response to an agency's request for an extension. Any new date is documented in the agency's file. (ii) When a protest is filed with the GAO, and an …
  • FAR 52.212-1 Instructions to Offerors—Commercial Products and Commercial Services.
    …tice received at any time before the exact time set for receipt of offers. Oral offers in response to oral solicitations may be withdrawn orally. If the solicitation authorizes facsimile offers, offers may be withdrawn via facsimile receive…
  • FAR 52.214-31 Facsimile Bids.
    …produces both printed and handwritten material. (b) Bidders may submit facsimile bids as responses to this solicitation. These responses must arrive at the place and by the time, specified in the solicitation. (c) Facsimile bids that fail…
  • FAR 52.222-62 Paid Sick Leave Under Executive Order 13706.
    …ignated in records as paid sick leave pursuant to E.O. 13706). (x) A copy of any written responses to employees' requests to use paid sick leave, including explanations for any denials of such requests, as required under 29 CFR 13.5(d)(3).…
  • FAR 52.225-26 Contractors Performing Private Security Functions Outside the United States.
    …nd the individuals responsible for the conduct. It includes providing timely and complete responses to Government auditors' and investigators' requests for documents and access to employees with information; (2) Does not foreclose any Cont…
  • FAR 52.242-1 Notice of Intent To Disallow Costs.
    …e Contractor may, after receiving a notice under subparagraph (1) above, submit a written response to the Contracting Officer, with justification for allowance of the costs. If the Contractor does respond within 60 days, the Contracting Off…
  • DFARS 225.7304 FMS customer involvement.
    …or, provide sufficient data to demonstrate the reasonableness of the price and reasonable responses to relevant questions concerning contract price. This data— (1) May include tailored responses, top-level pricing summaries, historical pri…
  • DFARS 252.225-7039 Defense Contractors Performing Private Security Functions Outside the United States.
    …nd the individuals responsible for the conduct. It includes providing timely and complete response to Government auditors' and investigators' requests for documents and access to employees with information; (2) Does not foreclose any contr…
  • DFARS 252.244-7001 Contractor Purchasing System Administration.
    …ts rationale for disagreeing. (3) The Contracting Officer will evaluate the Contractor's response and notify the Contractor, in writing, of the Contracting Officer's final determination concerning— (i) Remaining material weaknesses; (ii)…
  • FAR 1.201-1 The two councils.
    …ing comments on a proposed revision to the FAR; (3) Considering all comments received in response to notice of proposed revisions; (4) Arranging for public meetings; (5) Preparing any final revision in the appropriate FAR format and lang…
  • FAR 3.904-2 Procedures for investigating complaints.
    …t, contractor, and/or subcontractor shall be afforded the opportunity to submit a written response to the report of findings to the head of the agency and the Office of Inspector General in a time and manner that permits the agency head to …
  • FAR 3.905-1 Remedies.
    (a) Agency response to Inspector General report. Not later than 30 days after receiving a report pursuant to 3.904-2, the head of the agency shall— (1) Determine whether sufficient basis exists to conclude that the contractor or subcontrac…
  • FAR 4.1102 Policy.
    …te.gov/ ”; or (iii) Contracting officers in the conduct of emergency operations, such as responses to natural or environmental disasters or national or civil emergencies, e.g., Robert T. Stafford Disaster Relief and Emergency Assistance Ac…
  • FAR 5.101 Methods of disseminating information.
    …f 5.207(c). The notice must include a statement that all responsible sources may submit a response which, if timely received, must be considered by the agency. The information must be posted not later than the date the solicitation is issue…
  • FAR 8.405-2 Ordering procedures for services requiring a statement of work.
    …ctor who requests a copy of it. (d) Evaluation. The ordering activity shall evaluate all responses received using the evaluation criteria provided to the schedule contractors. The ordering activity is responsible for considering the level …

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.