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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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49 sections with “principal purpose”: the first 40

  • FAR 52.219-9 Small Business Subcontracting Plan.
    …plan goals, provided that protégé is a covered territory business or that protégé has its principal office located in the Commonwealth of Puerto Rico. In accordance with 43 U.S.C. 1626— (i) Subcontracts awarded to an ANC or Indian tribe sh…
  • FAR 19.102 Small business size standards and North American Industry Classification System codes.
    …sifying the product or service being acquired in the one industry that best describes the principal purpose of the supply or service being acquired. Primary consideration is given to the industry descriptions in the U.S. NAICS Manual, the p…
  • FAR 2.101 Definitions.
    … and acquisition programs created pursuant to 41 U.S.C. 1702. Chief of mission means the principal officer in charge of a diplomatic mission of the United States or of a United States office abroad which is designated by the Secretary of S…
  • FAR 22.1003-1 General.
    This subpart 22.10 applies to all Government contracts, the principal purpose of which is to furnish services in the United States through the use of service employees, except as exempted in 22.1003-3 and 22.1003-4 of this section, or any s…
  • FAR 35.003 Policy.
    (a) Use of contracts. Contracts shall be used only when the principal purpose is the acquisition of supplies or services for the direct benefit or use of the Federal Government. Grants or cooperative agreements should be used when the princ…
  • FAR 22.001 Definitions.
    …Division. Service contract means any Government contract, or subcontract thereunder, the principal purpose of which is to furnish services in the United States through the use of service employees, except as exempted by 41 U.S.C. chapter 6…
  • FAR 31.205-1 Public relations and advertising costs.
    …f sponsoring meetings, conventions, symposia, seminars, and other special events when the principal purpose of the event is other than dissemination of technical information or stimulation of production. (4) Costs of ceremonies such as (i)…
  • FAR 31.205-43 Trade, business, technical, and professional activity costs.
    …criptions to trade, business, professional, or other technical periodicals. (c) When the principal purpose of a meeting, convention, conference, symposium, or seminar is the dissemination of trade, business, technical or professional infor…
  • FAR 42.1503 Procedures.
    …ocedures. (b)(1) The evaluation should include a clear, non-technical description of the principal purpose of the contract or order. The evaluation should reflect how the contractor performed. The evaluation should include clear relevant i…
  • FAR 46.702 General.
    (a) The principal purposes of a warranty in a Government contract are (1) to delineate the rights and obligations of the contractor and the Government for defective items and services and (2) to foster quality performance. (b) Generally, a…
  • FAR 52.203-2 Certificate of Independent Price Determination.
    …)(3) above; or (2)(i) Has been authorized, in writing, to act as agent for the following principals in certifying that those principals have not participated, and will not participate in any action contrary to subparagraphs (a)(1) through …
  • DFARS 225.7004-1 Definitions.
    …tracker means a navigational tool used in a satellite weighing more than 400 pounds whose principal purpose is to support the national security, defense, or intelligence needs of the U.S. Government.
  • DFARS 237.102-71 Limitation on service contracts for military flight simulators.
    …ble commercial variant. (2) Service contract means any contract entered into by DoD, the principal purpose of which is to furnish services in the United States through the use of service employees as defined in 41 U.S.C. 6701. (b) Under S…
  • DFARS 247.573 General.
    …cedures at PGI 247.573(b)(2) when direct purchase of ocean transportation services is the principal purpose of the contract. (3) See PGI 247.573(b)(3) for agency and department procedures relating to annual reporting requirements of waiver…
  • DFARS 252.225-7064 Restriction on Acquisition of Certain Satellite Components.
    …tracker means a navigational tool used in a satellite weighing more than 400 pounds whose principal purpose is to support the national security, defense, or intelligence needs of the U.S. Government. (b) Restriction. In accordance with 10 …
  • FAR 42.1204 Applicability of novation agreements.
    …orporation duly organized and existing under the laws of ________ [insert State] with its principal office in ________ [insert city]; the XYZ CORPORATION (Transferee), [if appropriate add “formerly known as the EFG Corporation”] a corporati…
  • FAR 52.209-5 Certification Regarding Responsibility Matters.
    …tifies, to the best of its knowledge and belief, that— (i) The Offeror and/or any of its Principals— (A) Are ( ) are not ( ) presently debarred, suspended, proposed for debarment, or declared ineligible for the award of contracts by any F…
  • FAR 9.403 Definitions.
    …roposed debarment of a contractor which has the same or similar management, ownership, or principal employees as the contractor that was debarred, suspended, or proposed for debarment. Agency means any executive department, military depart…
  • FAR 9.406-2 Causes for debarment.
    …on action is stayed under 11 U.S.C. 362 (the Bankruptcy Code). (vi) Knowing failure by a principal, until 3 years after final payment on any Government contract awarded to the contractor, to timely disclose to the Government, in connection…
  • FAR 15.406-3 Documenting the negotiation.
    (a) The contracting officer shall document in the contract file the principal elements of the negotiated agreement. The documentation (e.g., price negotiation memorandum (PNM)) shall include the following: (1) The purpose of the negotiatio…
  • FAR 19.201 General policy.
    …nd familiar with the supplies or services contracted for by the activity; and (ii) Whose principal duty is to assist the SBA's assigned representative in performing functions and duties relating to sections 8, 15, 31, 36, and 44 of the Sma…
  • FAR 19.702 Statutory requirements.
    …plan goals, provided that protégé is a covered territory business or that protégé has its principal office located in the Commonwealth of Puerto Rico.
  • FAR 19.704 Subcontracting plan requirements.
    …goals established as a percentage of total subcontract dollars; (3) A description of the principal types of supplies and services to be subcontracted and an identification of types of supplies or services planned for subcontracting to smal…
  • FAR 28.204-1 United States bonds or notes.
    …he collection or sale of such United States bonds or notes in the event of default of the principal on the bond shall accompany the deposited bonds or notes. The contracting officer may (a) turn securities over to the finance or other autho…
  • FAR 31.205-18 Independent research and development and bid and proposal costs.
    …attempts to advance the state of the art. Applied research does not include efforts whose principal aim is design, development, or test of specific items or services to be considered for sale; these efforts are within the definition of the …
  • FAR 35.001 Definitions.
    …d by contractors in cost principle applications, this term does not include efforts whose principal aim is the design, development, or testing of specific items or services to be considered for sale; these efforts are within the definition …
  • FAR 42.1501 General.
    …tracts to its protégé, and that protégé is a covered territory business or that protégé's principal office is located in the Commonwealth of Puerto Rico (see 15 U.S.C. 657r(a)); (6) Reporting into databases (see subpart 4.14, and reporting…
  • FAR 49.501 General.
    This subpart prescribes the principal contract termination clauses. This subpart does not apply to contracts that use the clause at 52.213-4, Terms and Conditions—Simplified Acquisitions (Other Than Commercial Products and Commercial Servic…
  • FAR 50.201 Definitions.
    …of a domestic United States air carrier or a United States-flag vessel (or a vessel based principally in the United States on which United States income tax is paid and whose insurance coverage is subject to regulation in the United States)…
  • FAR 52.000 Scope of part.
    …tion, and (c) presents a matrix listing the FAR provisions and clauses applicable to each principal contract type and/or purpose (e.g., fixed-price supply, cost-reimbursement research and development).
  • FAR 52.101 Using part 52.
    …ternet at https://www.acquisition.gov/smart-matrix. The matrix contains a column for each principal type and/or purpose of contract (e.g., fixed-price supply, cost reimbursement research and development). The matrix lists the— (i) Required…
  • FAR 52.212-3 Offeror Representations and Certifications—Commercial Products and Commercial Services.
    …or certifies, to the best of its knowledge and belief, that the offeror and/or any of its principals— (1) □ Are, □ are not presently debarred, suspended, proposed for debarment, or declared ineligible for the award of contracts by any Fede…
  • FAR 52.232-12 Advance Payments.
    …raph (e) of the basic clause with the appropriate percentage specified: To liquidate the principal amount of any advance payment made to the Contractor, there shall be deductions of ___ percent from all payments made by the Government unde…
  • FAR 52.232-25 Prompt payment.
    …oice on which the unpaid late payment interest is due; and (3) State that payment of the principal has been received, including the date of receipt. (B) If there is no postmark or the postmark is illegible— (1) The designated payment off…
  • FAR 52.232-26 Prompt Payment for Fixed-Price Architect-Engineer Contracts.
    …oice on which the unpaid late payment interest is due; and (3) State that payment of the principal has been received, including the date of receipt. (B) If there is no postmark or the postmark is illegible— (1) The designated payment off…
  • FAR 52.232-27 Prompt Payment for Construction Contracts.
    …ice on which the unpaid late payment interest was due; and (3) State that payment of the principal has been received, including the date of receipt. (B) If there is no postmark or the postmark is illegible— (1) The designated payment off…
  • FAR 52.250-3 SAFETY Act Block Designation/Certification.
    …of a domestic United States air carrier or a United States-flag vessel (or a vessel based principally in the United States on which United States income tax is paid and whose insurance coverage is subject to regulation in the United States)…
  • FAR 52.250-4 SAFETY Act Pre-qualification Designation Notice.
    …of a domestic United States air carrier or a United States-flag vessel (or a vessel based principally in the United States on which United States income tax is paid and whose insurance coverage is subject to regulation in the United States)…
  • FAR 52.250-5 SAFETY Act—Equitable Adjustment.
    …of a domestic United States air carrier or a United States-flag vessel (or a vessel based principally in the United States on which United States income tax is paid and whose insurance coverage is subject to regulation in the United States)…
  • FAR 52.300 Scope of subpart.
    The matrix contains a column for each principal type and/or purpose of contract (see 52.101(e)).

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.