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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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139 sections with “material change”: the first 40

  • FAR 16.601 Time-and-materials contracts.
    (a) Definitions for the purposes of Time-and-Materials Contracts. Direct materials means those materials that enter directly into the end product, or that are used or consumed directly in connection with the furnishing of the end product o…
  • FAR 30.602 Materiality.
    (a) In determining materiality, the CFAO shall use the criteria in 48 CFR 9903.305. (b) A CFAO determination of materiality— (1) May be made before or after a general dollar magnitude proposal has been submitted, depending on the particul…
  • FAR 52.216-4 Economic Price Adjustment—Labor and Material.
    …scribed in 16.203-4(c), insert the following clause: Economic Price Adjustment—Labor and Material (JAN 2017) (a) The Contractor shall notify the Contracting Officer if, at any time during contract performance, the rates of pay for labor (…
  • FAR 52.223-3 Hazardous Material Identification and Material Safety Data.
    As prescribed in 23.304(a)(1), insert the following clause: Hazardous Material Identification and Material Safety Data (FEB 2021) (a) Hazardous material, as used in this clause, includes any material defined as hazardous under the latest …
  • FAR 52.223-7 Notice of Radioactive Materials.
    As prescribed in 23.304(b), insert the following clause: Notice of Radioactive Materials (JAN 1997) (a) The Contractor shall notify the Contracting Officer or designee, in writing, ___ * days prior to the delivery of, or prior to completi…
  • DFARS 252.216-7003 Economic price adjustment—wage rates or material prices controlled by a foreign government.
    …in 216.203-4-70(c)(1), use the following clause: Economic Price Adjustment—Wage Rates or Material Prices Controlled by a Foreign Government (MAR 2012) (a) As represented by the Contractor in its offer, the prices set forth in this contrac…
  • DFARS 252.242-7004 Material Management and Accounting System.
    As prescribed in 242.7204, use the following clause: Material Management and Accounting System (Jan 2025) (a) Definitions. As used in this clause— Acceptable material management and accounting system means a material management and accou…
  • FAR 15.306 Exchanges with offerors after receipt of proposals.
    …valuation process. Such communications shall not be used to cure proposal deficiencies or material omissions, materially alter the technical or cost elements of the proposal, and/or otherwise revise the proposal. Such communications may be …
  • FAR 52.243-3 Changes—Time-and-Materials or Labor-Hours.
    As prescribed in 43.205(c), insert the following clause: Changes—Time-and-Materials or Labor-Hours (SEP 2000) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make changes within t…
  • FAR 28.302 Notice of cancellation or change.
    …de insurance coverage, the policies shall contain an endorsement that any cancellation or material change in the coverage adversely affecting the Government's interest shall not be effective unless the insurer or the contractor gives writte…
  • FAR 2.101 Definitions.
    …or in significant part, of biological products, including renewable domestic agricultural materials and forestry materials, or that is an intermediate ingredient or feedstock. The term includes, with respect to forestry materials, forest pr…
  • FAR 8.404 Use of Federal Supply Schedules.
    … (1) The ordering activity shall specify the order type (i.e., firm-fixed price, time-and-materials, or labor-hour) for the services offered on the schedule priced at hourly rates. (2) Agencies shall use fixed-price orders for the acquisit…
  • FAR 9.406-3 Procedures.
    …he suspending and debarring official extends the opportunity for the contractor to submit material in opposition, then the official should also give a deadline for submission of materials. The suspending and debarring official may use flexi…
  • FAR 9.407-3 Procedures.
    …he suspending and debarring official extends the opportunity for the contractor to submit material in opposition, then the official should also give a deadline for submission of materials. The suspending and debarring official may use the f…
  • FAR 12.207 Contract type.
    …ent for the acquisition of commercial products or commercial services. (b)(1) A time-and-materials contract or labor-hour contract (see Subpart 16.6) may be used for the acquisition of commercial services when— (i) The service is acquired…
  • FAR 15.404-1 Proposal analysis techniques.
    …not be a valid basis for comparison. (B) The prior price must be adjusted to account for materially differing terms and conditions, quantities and market and economic factors. For similar items, the contracting officer must also adjust the…
  • FAR 15.404-4 Profit.
    …ate differences in the categories used by prospective contractors for listing costs— (A) Material acquisition. This subfactor measures the managerial and technical effort needed to obtain the required purchased parts and material, subcontr…
  • FAR 15.408 Solicitation provisions and contract clauses.
    …an a noncompliance that the cognizant Federal agency official has determined to have an immaterial cost impact), and, if yes, an explanation; whether any aspect of this proposal is inconsistent with your disclosed practices or applicable CA…
  • FAR 16.203-4 Contract clauses.
    …by the chief of the contracting office. (c) Adjustments based on actual cost of labor or material. (1) The contracting officer shall, when contracting by negotiation, insert a clause that is substantially the same as the clause at 52.216-4…
  • FAR 30.604 Processing changes to disclosed or established cost accounting practices.
    …itude (GDM) proposal by a specified date, unless the CFAO determines the cost impact is immaterial; or (ii) For unilateral changes that the contractor requests to be determined desirable changes, inform the contractor that the request shal…
  • FAR 30.605 Processing noncompliances.
    …rationale to support any written statement that the cost impact of the noncompliance is immaterial. (3) The CFAO shall— (i) If applicable, review the reasons why the contractor considers the existing practices to be compliant or the cost …
  • FAR 31.001 Definitions.
    …d means a preestablished measure, expressed in temporal terms, of the quantity of labor. Material cost at standard means a preestablished measure of the material elements of cost, computed by multiplying material-price standard by material…
  • FAR 45.101 Definitions.
    … become a component part of another article when put into use. Equipment does not include material, real property, special test equipment or special tooling. Government-furnished property means property in the possession of, or directly ac…
  • FAR 52.212-3 Offeror Representations and Certifications—Commercial Products and Commercial Services.
    … and service codes (PSCs) 1000-9999, except— (1) PSC 5510, Lumber and Related Basic Wood Materials; (2) Product or Service Group (PSG) 87, Agricultural Supplies; (3) PSG 88, Live Animals; (4) PSG 89, Subsistence; (5) PSC 9410, Crude Gr…
  • FAR 52.212-4 Contract Terms and Conditions—Commercial Products and Commercial Services.
    …by reference into the contract. (End of clause) Alternate I (NOV 2021). When a time-and-materials or labor-hour contract is contemplated, substitute the following paragraphs (a), (e), (i), (l), and (m) for those in the basic clause. (a) …
  • FAR 52.219-9 Small Business Subcontracting Plan.
    …eror will make a good faith effort to acquire articles, equipment, supplies, services, or materials, or obtain the performance of construction work from the small business concerns that it used in preparing the bid or proposal, in the same …
  • FAR 52.230-6 Administration of Cost Accounting Standards.
    … FAR 16.202, 16.203, (except when price adjustments are based on actual costs of labor or material, described at 16.203-1(a)(2)), and 16.207; (2) Fixed-price incentive contracts and subcontracts where the price is not adjusted based on act…
  • FAR 52.232-5 Payments Under Fixed-Price Construction Contracts.
    …ting Officer. (2) In the preparation of estimates, the Contracting Officer may authorize material delivered on the site and preparatory work done to be taken into consideration. Material delivered to the Contractor at locations other than …
  • FAR 52.232-12 Advance Payments.
    …al account only to pay for properly allocable, allowable, and reasonable costs for direct materials, direct labor, and indirect costs. Other withdrawals require approval in writing by the administering office. Determinations of whether cost…
  • FAR 52.245-1 Government Property.
    … become a component part of another article when put into use. Equipment does not include material, real property, special test equipment or special tooling. Government-furnished property means property in the possession of, or directly ac…
  • FAR 52.246-12 Inspection of Construction.
    …pection of Construction (AUG 1996) (a) Definition. Work includes, but is not limited to, materials, workmanship, and manufacture and fabrication of components. (b) The Contractor shall maintain an adequate inspection system and perform su…
  • DFARS 216.203-4-70 Additional provisions and clauses.
    …btained at a level above the contracting officer. (c) Price adjustment for wage rates or material prices controlled by a foreign government. (1)(i) The price adjustment clause at 252.216-7003, Economic Price Adjustment—Wage Rates or Materi…
  • DFARS 252.215-7002 Cost Estimating System Requirements.
    …s, accumulation of historical costs, and other analyses used to generate cost estimates. Material weakness means a deficiency or combination of deficiencies in the internal control over information in contractor business systems, such that…
  • DFARS 252.217-7005 Inspection and manner of doing work.
    …ovided in the job order, all operational practices of the Contractor and all workmanship, material, equipment, and articles used in the performance of work under the Master Agreement shall be in accordance with the best commercial marine pr…
  • DFARS 252.227-7013 Rights in Technical Data—Other Than Commercial Products and Commercial Services.
    …t code listings, design details, algorithms, processes, flow charts, formulae and related material that would enable the software to be reproduced, recreated, or recompiled. Computer software does not include computer data bases or computer…
  • 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.
    … code listings, design details, algorithms, processes, flow charts, formulae, and related material that would enable the software to be reproduced, re-created, or recompiled. Computer software does not include computer databases or computer…
  • DFARS 252.229-7004 Status of contractors as a direct contractor (Spain).
    …nt of Defense has executed a written agreement that allows duty-free import of equipment, materials, and supplies into Spain for the construction, development, maintenance, and operation of Spanish-American installations and facilities. (b…
  • DFARS 252.234-7002 Earned Value Management System.
    …em that complies with the earned value management system guidelines in the ANSI/EIA-748. Material weakness means a deficiency or combination of deficiencies in the internal control over information in contractor business systems, such that…
  • DFARS 252.236-7005 Airfield safety precautions.
    …ause while— (i) Operating all ground equipment (mobile or stationary); (ii) Placing all materials; and (iii) Performing all work, upon and around all airfields. (2) The requirements of this clause are in addition to any other safety req…
  • DFARS 252.244-7001 Contractor Purchasing System Administration.
    …urchasing system that complies with the system criteria in paragraph (c) of this clause. Material weakness means a deficiency or combination of deficiencies in the internal control over information in contractor business systems, such that…

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.