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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397 sections with “Modification”: the first 40
- 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 15.208 Submission, modification, revision, and withdrawal of proposals.(a) Offerors are responsible for submitting proposals, and any revisions, and modifications, so as to reach the Government office designated in the solicitation by the time specified in the solicitation. Offerors may use any transmission me…
- 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…
- FAR 43.103 Types of contract modifications.Contract modifications are of the following types: (a) Bilateral. A bilateral modification (supplemental agreement) is a contract modification that is signed by the contractor and the contracting officer. Bilateral modifications are used t…
- FAR 52.214-27 Price Reduction for Defective Certified Cost or Pricing Data—Modifications—Sealed Bidding.…nsert the following clause: 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 increas…
- FAR 52.214-28 Subcontractor Certified Cost or Pricing Data—Modifications—Sealed Bidding.…01-7(c)(1)(i), insert 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 modifi…
- FAR 52.215-11 Price Reduction for Defective Certified Cost or Pricing Data—Modifications.…nsert the following clause: Price Reduction for Defective Certified Cost or Pricing Data—Modifications (JUN 2020) (a) This clause shall become operative only for any modification to this contract involving a pricing adjustment expected to…
- FAR 52.215-13 Subcontractor Certified Cost or Pricing Data—Modifications.… 15.408(e)(1), insert the following clause: Subcontractor Certified Cost or Pricing Data—Modifications (JUN 2020) (a) The requirements of paragraphs (b) and (c) of this clause shall— (1) Become operative only for any modification to this…
- FAR 52.215-21 Requirements for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data—Modifications.…nts for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data—Modifications (NOV 2021) (a) Exceptions from certified cost or pricing data. (1) In lieu of submitting certified cost or pricing data for modificatio…
- DFARS 204.1671 Order of application for modifications.(a) Circumstances may exist in which the numeric order of the modifications to a contract is not the order in which the changes to the contract actually take effect. (b) In order to determine the sequence of modifications to a contract or …
- 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 52.214-7 Late submissions, modifications, and withdrawals of bids.As prescribed in 14.201-6(c)(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…
- FAR 52.214-23 Late submissions, modifications, revisions, and withdrawals of technical proposals under two-step sealed bidding.As prescribed in 14.201-6(r), insert the following provision: Late Submissions, Modifications, Revisions, and Withdrawals of Technical Proposals Under Two-Step Sealed Bidding (NOV 1999) (a) Bidders are responsible for submitting technical…
- FAR 53.243 Contract modifications (SF 30).SF 30 (11/2016), Amendment of Solicitation/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 contra…
- DFARS 252.236-7000 Modification proposals—price breakdown.As prescribed in 236.570(a), use the following clause: Modification Proposals—Price Breakdown (DEC 1991) (a) The Contractor shall furnish a price breakdown, itemized as required and within the time specified by the Contracting Officer, wi…
- 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.
- DFARS 217.7103-6 Modification of master agreements.…odifying the master agreement itself. It shall not be changed through a job order. (c) A modification to a master agreement shall not affect job orders issued before the effective date of the modification.
- DFARS 252.215-7004 Requirement for Submission of Data Other Than Certified Cost or Pricing Data—Modifications-Canadian Commercial Corporation.…ing clause: Requirement for Submission of Data Other Than Certified Cost or Pricing Data—Modifications—Canadian Commercial Corporation (OCT 2013) This clause, in lieu of FAR 52.215-21, applies only if award is to the Canadian Commercial C…
- 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…
- DFARS 227.7105-2 Acquisition of existing works without modification.…cts exclusively for existing works when— (1) The existing works will be acquired without modification; and (2) The Government requires the right to reproduce, prepare derivative works, or publicly perform or display the existing works; or…
- DFARS 243.172 Application of modifications.Follow the procedures in 204.1671 for determining the sequence for application of modifications to a contract or order.
- DFARS 243.205-70 Pricing of contract modifications.Use the clause at 252.243-7001, Pricing of Contract Modifications, in solicitations and contracts when anticipating and using a fixed price type contract.
- DFARS 252.243-7001 Pricing of contract modifications.As prescribed in 243.205-70, use the following clause: Pricing of Contract Modifications (DEC 1991) When costs are a factor in any price adjustment under this contract, the contract cost principles and procedures in FAR part 31 and DFARS …
- FAR 1.705 Supersession and modification.(a) If a D&F is superseded by another D&F, that action shall not render invalid any action taken under the original D&F prior to the date of its supersession. (b) The contracting officer need not cancel the solicitation if the D&F, as modi…
- 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 4.201 Procedures.Contracting officers shall distribute copies of contracts or modifications within 10 working days after execution by all parties. As a minimum, the contracting officer shall— (a) Distribute simultaneously one signed copy or reproduction of…
- FAR 4.803 Contents of contract files.…ce of award. (26) The original of— (i) The signed contract or award; (ii) All contract modifications; and (iii) Documents supporting modifications executed by the contracting office. (27) Synopsis of award or reference thereto. (28) N…
- 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 14.201-7 Contract clauses.…ernate I in all solicitations and contracts. (ii)(A) In the case of a bilateral contract modification that will use funds appropriated or otherwise made available by the American Recovery and Reinvestment Act of 2009, the contracting offic…
- FAR 15.403-1 Prohibition on obtaining certified cost or pricing data (10 U.S.C. chapter 271 and 41 U.S.C. chapter 35).…require certified cost or pricing data to support any action (contracts, subcontracts, or modifications) (but may require data other than certified cost or pricing data as defined in FAR 2.101 to support a determination of a fair and reason…
- 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 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 19.301-2 Rerepresentation by a contractor that represented its status as a small business concern.…ract— (i) Within 30 days after execution of a novation agreement or within 30 days after modification of the contract to include the clause at 52.219-28, Postaward Small Business Program Rerepresentation, if the novation agreement was exec…
- 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 43.102 Policy.…ing officers acting within the scope of their authority are empowered to execute contract modifications on behalf of the Government. Other Government personnel shall not— (1) Execute contract modifications; (2) Act in such a manner as to …
- FAR 43.301 Use of forms.(a)(1) The Standard Form 30 (SF 30), Amendment of Solicitation/Modification of Contract, exclusive of actions processed under part 15, shall (except for the options stated in 43.301(a)(2) or actions processed under part 15) be used for— (i…
- FAR 52.214-26 Audit and Records—Sealed Bidding.…n required to submit certified cost or pricing data in connection with the pricing of any modification to this contract, the Contracting Officer, or an authorized representative of the Contracting Officer, in order to evaluate the accuracy,…
- 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 (chapter 1)
- Part 1 Federal Acquisition Regulations System 58 sections
- Part 2 Definitions of Words and Terms 3 sections
- Part 3 Improper Business Practices and Personal Conflicts of Interest 98 sections
- Part 4 Administrative and Information Matters 116 sections
- Part 5 Publicizing Contract Actions 34 sections
- Part 6 Competition Requirements 34 sections
- Part 7 Acquisition Planning 34 sections
- Part 8 Required Sources of Supplies and Services 67 sections
- Part 9 Contractor Qualifications 106 sections
- Part 10 Market Research 4 sections
- Part 11 Describing Agency Needs 33 sections
- Part 12 Acquisition of Commercial Products and Commercial Services 38 sections
- Part 13 Simplified Acquisition Procedures 49 sections
- Part 14 Sealed Bidding 82 sections
- Part 15 Contracting by Negotiation 81 sections
- Part 16 Types of Contracts 74 sections
- Part 17 Special Contracting Methods 50 sections
- Part 18 Emergency Acquisitions 34 sections
- Part 19 Small Business Programs 126 sections
- Part 22 Application of Labor Laws to Government Acquisitions 205 sections
- Part 23 Environment, Sustainable Acquisition, and Material Safety 38 sections
- Part 24 Protection of Privacy and Freedom of Information 10 sections
- Part 25 Foreign Acquisition 81 sections
- Part 26 Other Socioeconomic Programs 36 sections
- Part 27 Patents, Data, and Copyrights 59 sections
- Part 28 Bonds and Insurance 61 sections
- Part 29 Taxes 23 sections
- Part 30 Cost Accounting Standards Administration 30 sections
- Part 31 Contract Cost Principles and Procedures 87 sections
- Part 32 Contract Financing 175 sections
- Part 33 Protests, Disputes, and Appeals 23 sections
- Part 34 Major System Acquisition 20 sections
- Part 35 Research and Development Contracting 25 sections
- Part 36 Construction and Architect-engineer Contracts 81 sections
- Part 37 Service Contracting 46 sections
- Part 38 Federal Supply Schedule Contracting 3 sections
- Part 39 Acquisition of Information Technology 14 sections
- Part 40 Information Security and Supply Chain Security 12 sections
- Part 41 Acquisition of Utility Services 17 sections
- Part 42 Contract Administration and Audit Services 84 sections
- Part 43 Contract Modifications 14 sections
- Part 44 Subcontracting Policies and Procedures 24 sections
- Part 45 Government Property 33 sections
- Part 46 Quality Assurance 60 sections
- Part 47 Transportation 106 sections
- Part 48 Value Engineering 13 sections
- Part 49 Termination of Contracts 108 sections
- Part 50 Extraordinary Contractual Actions and the Safety Act 34 sections
- Part 51 Use of Government Sources by Contractors 15 sections
- Part 52 Solicitation Provisions and Contract Clauses 680 sections
- Part 53 Forms 61 sections
DFARS (chapter 2, Defense)
- Part 201 Federal Acquisition Regulations System 24 sections
- Part 202 Definitions of Words and Terms 1 sections
- Part 203 Improper Business Practices and Personal Conflicts of Interest 28 sections
- Part 204 Administrative and Information Matters 76 sections
- Part 205 Publicizing Contract Actions 11 sections
- Part 206 Competition Requirements 20 sections
- Part 207 Acquisition Planning 22 sections
- Part 208 Required Sources of Supplies and Services 31 sections
- Part 209 Contractor Qualifications 55 sections
- Part 210 Market Research 2 sections
- Part 211 Describing Agency Needs 22 sections
- Part 212 Acquisition of Commercial Products and Commercial Services 24 sections
- Part 213 Simplified Acquisition Procedures 23 sections
- Part 214 Sealed Bidding 14 sections
- Part 215 Contracting by Negotiation 66 sections
- Part 216 Types of Contracts 36 sections
- Part 217 Special Contracting Methods 64 sections
- Part 218 Emergency Acquisitions 7 sections
- Part 219 Small Business Programs 47 sections
- Part 222 Application of Labor Laws to Government Acquisitions 56 sections
- Part 223 Environment, Sustainable Acquisition, and Material Safety 34 sections
- Part 224 Protection of Privacy and Freedom of Information 2 sections
- Part 225 Foreign Acquisition 251 sections
- Part 226 Other Socioeconomic Programs 14 sections
- Part 227 Patents, Data, and Copyrights 99 sections
- Part 228 Bonds and Insurance 17 sections
- Part 229 Taxes 9 sections
- Part 230 Cost Accounting Standards Administration 2 sections
- Part 231 Contract Cost Principles and Procedures 13 sections
- Part 232 Contract Financing 74 sections
- Part 233 Protests, Disputes, and Appeals 8 sections
- Part 234 Major System Acquisition 13 sections
- Part 235 Research and Development Contracting 16 sections
- Part 236 Construction and Architect-engineer Contracts 25 sections
- Part 237 Service Contracting 67 sections
- Part 239 Acquisition of Information Technology 38 sections
- Part 241 Acquisition of Utility Services 8 sections
- Part 242 Contract Administration and Audit Services 40 sections
- Part 243 Contract Modifications 18 sections
- Part 244 Subcontracting Policies and Procedures 13 sections
- Part 245 Government Property 23 sections
- Part 246 Quality Assurance 39 sections
- Part 247 Transportation 27 sections
- Part 249 Termination of Contracts 14 sections
- Part 250 Extraordinary Contractual Actions and the Safety Act 16 sections
- Part 251 Use of Government Sources by Contractors 5 sections
- Part 252 Solicitation Provisions and Contract Clauses 405 sections
- Part 253 Forms 10 sections
- Part 270 Defense Contracting Programs 7 sections
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Rule changes in progress: FAR, DFARS. Terms: glossary.