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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172 sections with “contract modifications”: the first 40
- 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…
- 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 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 204.7106 Contract modifications.(a) If new items are added, assign new contract line or subline item numbers or exhibit line item numbers, in accordance with the procedures established at 204.7103, 204.7104, and 204.7105. (b) Modifications to existing contract line items…
- 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.
- FAR 52.214-28 Subcontractor Certified Cost or Pricing Data—Modifications—Sealed Bidding.As prescribed in 14.201-7(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 operativ…
- FAR 52.215-13 Subcontractor Certified Cost or Pricing Data—Modifications.As prescribed in 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 modi…
- FAR 4.803 Contents of contract files.The following are examples of the records normally contained, if applicable, in contract files: (a) Contracting office contract file. (1) Purchase request, acquisition planning information, and other presolicitation documents. (2) Justifi…
- FAR 4.903 Reporting contract information to the IRS.…ies to report certain information to the IRS. (b)(1) The required information applies to contract modifications— (i) Increasing the amount of a contract awarded before January 1, 1989, by $50,000 or more; and (ii) Entered into on or afte…
- FAR 15.408 Solicitation provisions and contract clauses.(a) Changes or Additions to Make-or-Buy Program. The contracting officer shall insert the clause at 52.215-9, Changes or Additions to Make-or-Buy Program, in solicitations and contracts when it is contemplated that a make-or- buy program wi…
- FAR 19.705-6 Postaward responsibilities of the contracting officer.After a contract or contract modification containing a subcontracting plan is awarded or an existing subcontracting plan is amended, the contracting officer shall do the following: (a) Notify the SBA of the award by sending a copy of the a…
- FAR 31.103 Contracts with commercial organizations.This category includes all contracts and contract modifications for supplies, services, or experimental, developmental, or research work negotiated with organizations other than educational institutions (see 31.104), construction and archit…
- FAR 31.104 Contracts with educational institutions.This category includes all contracts and contract modifications for research and development, training, and other work performed by educational institutions (defined as institutions of higher educations in the OMB Uniform Guidance at 2 CFR …
- FAR 31.105 Construction and architect-engineer contracts.(a) This category includes all contracts and contract modifications negotiated on the basis of cost with organizations other than educational institutions (see 31.104), State and local governments (see 31.107), and nonprofit organizations e…
- FAR 42.302 Contract administration functions.(a) The contracting officer normally delegates the following contract administration functions to a CAO. The contracting officer may retain any of these functions, except those in paragraphs (a)(5), (a)(9), (a)(11), and (a)(12) of this sect…
- FAR 52.232-5 Payments Under Fixed-Price Construction Contracts.…ed in 32.111(a)(5), insert the following clause: Payments Under Fixed-Price Construction Contracts (MAY 2014) (a) Payment of price. The Government shall pay the Contractor the contract price as provided in this contract. (b) Progress pay…
- FAR 52.232-10 Payments Under Fixed-Price Architect-Engineer Contracts.…32.111(c)(1), insert the following clause: Payments Under Fixed-Price Architect-Engineer Contracts (APR 2010) (a) Estimates shall be made monthly of the amount and value of the work and services performed by the Contractor under this cont…
- DFARS 212.301 Solicitation provisions and contract clauses for the acquisition of commercial products and commercial services.…7301. (f) The following additional provisions and clauses apply to DoD solicitations and contracts using FAR part 12 procedures for the acquisition of commercial products and commercial services. If the offeror has completed any of the fol…
- 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 19.301-2 Rerepresentation by a contractor that represented its status as a small business concern.(a) Definition. As used in this subsection— Long-term contract means a contract of more than five years in duration, including options. However, the term does not include contracts that exceed five years in duration because the period of p…
- FAR 19.812 Contract administration.(a) The contracting officer shall assign contract administration functions, as required, based on the location of the 8(a) contractor (see Federal Directory of Contract Administration Services Components (available via the Internet athttps:…
- FAR 22.404-6 Modifications of wage determinations.…he work in a solicitation is determined by the time of receipt of the modification by the contracting agency. Therefore, the contracting agency must annotate the modification of the project wage determination with the date and time immediat…
- FAR 27.303 Contract clauses.(a)(1) Insert a patent rights clause in all solicitations and contracts for experimental, developmental, or research work as prescribed in this section. (2) This section also applies to solicitations or contracts for construction work or a…
- FAR 31.102 Fixed-price contracts.The applicable subparts of part 31 shall be used in the pricing of fixed-price contracts, subcontracts, and modifications to contracts and subcontracts whenever (a) cost analysis is performed, or (b) a fixed-price contract clause requires t…
- FAR 32.501-3 Contract price.…pose of making progress payments and determining the limitation on progress payments, the contract price shall be as follows: (1) Under firm-fixed price contracts, the contract price is the current amount fixed by the contract plus the not…
- FAR 32.504 Subcontracts under prime contracts providing progress payments.(a) Subcontracts may include either performance-based payments, provided they meet the criteria in 32.1003, or progress payments, provided they meet the criteria in subpart 32.5 for customary progress payments, but not both. Subcontracts fo…
- FAR 41.204 GSA areawide contracts.(a) Purpose. GSA enters into areawide contracts (see 41.101) for use by Federal agencies. Areawide contracts provide a pre-established contractual vehicle for ordering utility services under the conditions in paragraph (c)(1) of this sectio…
- FAR 42.1205 Agreement to recognize contractor's change of name.(a) If only a change of the contractor's name is involved and the Government's and contractor's rights and obligations remain unaffected, the parties shall execute an agreement to reflect the name change. The contractor shall forward to the…
- FAR 44.204 Contract clauses.(a)(1) The contracting officer shall insert the clause at 52.244-2, Subcontracts, in solicitations and contracts when contemplating— (i) A cost-reimbursement contract; (ii) A letter contract that exceeds the simplified acquisition thresho…
- FAR 45.107 Contract clauses.(a)(1) Except as provided in paragraph (d) of this section, the contracting officer shall insert the clause at 52.245-1, Government Property, in— (i) All cost-reimbursement and time-and-material type solicitations and contracts, and labor-…
- FAR 52.204-28 Federal Acquisition Supply Chain Security Act Orders—Federal Supply Schedules, Governmentwide Acquisition Contracts, and Multi-Agency Contracts.…ion Supply Chain Security Act Orders—Federal Supply Schedules, Governmentwide Acquisition Contracts, and Multi-Agency Contracts (DEC 2023) (a) Definitions. As used in this clause— Covered article, as defined in 41 U.S.C. 4713(k), means— …
- FAR 52.209-3 First Article Approval—Contractor Testing.…s prescribed in 9.308-1 (a) and (b), insert the following clause: First Article Approval—Contractor Testing (SEP 1989) [Contracting Officer shall insert details] (a) The Contractor shall test __ unit(s) of Lot/Item __ as specified in thi…
- FAR 52.212-4 Contract Terms and Conditions—Commercial Products and Commercial Services.As prescribed in 12.301(b)(3), insert the following clause: Contract Terms and Conditions—Commercial Products and Commercial Services (NOV 2023) (a) Inspection/Acceptance. The Contractor shall only tender for acceptance those items that c…
- FAR 52.214-27 Price Reduction for Defective Certified Cost or Pricing Data—Modifications—Sealed Bidding.…ding (JUN 2020) (a) This clause shall become operative only for any modification to this contract involving aggregate increases and/or decreases in costs, plus applicable profits, expected to exceed the threshold for the submission of cert…
- FAR 52.215-11 Price Reduction for Defective Certified Cost or Pricing Data—Modifications.…ions (JUN 2020) (a) This clause shall become operative only for any modification to this contract involving a pricing adjustment expected to exceed the threshold for submission of certified cost or pricing data in Federal Acquisition Regul…
- FAR 52.215-12 Subcontractor Certified Cost or Pricing Data.As prescribed in 15.408(d)(1), insert the following clause: Subcontractor Certified Cost or Pricing Data (JUN 2020) (a) Before awarding any subcontract expected to exceed the threshold for submission of certified cost or pricing data in F…
- FAR 52.215-21 Requirements for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data—Modifications.…ta. (1) In lieu of submitting certified cost or pricing data for modifications under this contract, for price adjustments expected to exceed the threshold set forth in Federal Acquisition Regulation (FAR) 15.403-4(a)(1) on the date of the a…
- FAR 52.232-7 Payments under Time-and-Materials and Labor-Hour Contracts.…111(a)(7), insert the following clause: Payments Under Time-and-Materials and Labor-Hour Contracts (NOV 2021) The Government will pay the Contractor as follows upon the submission of vouchers approved by the Contracting Officer or the aut…
- FAR 52.244-2 Subcontracts.As prescribed in 44.204(a)(1), insert the following clause: Subcontracts (JUN 2020) (a) Definitions. As used in this clause— Approved purchasing system means a Contractor's purchasing system that has been reviewed and approved in accorda…
- FAR 52.247-27 Contract Not Affected by Oral Agreement.As prescribed in 47.207-8(b), insert the following clause in solicitations and contracts for transportation or for transportation-related services: Contract Not Affected by Oral Agreement (APR 1984) No oral statement of any person shall m…
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.