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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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27 sections with “commence work”

  • FAR 52.211-10 Commencement, Prosecution, and Completion of Work.
    …accommodate the issuance of orders under indefinite-delivery contracts for construction. Commencement, Prosecution, and Completion of Work (APR 1984) The Contractor shall be required to (a) commence work under this contract within __ [Con…
  • FAR 22.1014 Delay over 60 days in bid opening or commencement of work.
    If a wage determination was obtained through the e98 process, and bid opening, or commencement of work under a negotiated contract has been delayed, for whatever reason, more than 60 days from the date indicated on the previously submitted …
  • FAR 52.216-23 Execution and Commencement of Work.
    …ted, except that it may be omitted from letter contracts awarded on SF 26: Execution and Commencement of Work (APR 1984) The Contractor shall indicate acceptance of this letter contract by signing three copies of the contract and returnin…
  • FAR 52.222-41 Service Contract Labor Standards.
    … determined by the Wage and Hour Division retroactive to the date such class of employees commenced contract work shall be a violation of the Service Contract Labor Standards statute and this contract. (vi) Upon discovery of failure to com…
  • FAR 52.237-7 Indemnification and Medical Liability Insurance.
    …ill perform under this contract shall be provided to the Contracting Officer prior to the commencement of services under this contract. If the insurance is on a claims-made basis and evidence of an extended reporting endorsement is not prov…
  • FAR 22.1012-1 Prevailing wage determinations.
    … 30 days of the award or the specified modification, and if contract performance does not commence within 30 days of the award or the specified modification, any revision received by the contracting agency not less than 10 days before comme…
  • FAR 22.1012-2 Wage determinations based on collective bargaining agreements.
    …ard of the contract or of the specified modification, or if contract performance does not commence within 30 days of the award of the contract or of the specified modification, any notice of the terms of a new or changed collective bargaini…
  • 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.
    …hts for a period of 5 years, or such other period as may be negotiated. This period shall commence upon award of the contract, subcontract, letter contract (or similar contractual instrument), or contract modification (including a modificat…
  • FAR 11.404 Contract clauses.
    …ate III. (b) Construction. The contracting officer shall insert the clause at 52.211-10, Commencement, Prosecution, and Completion of Work, in solicitations and contracts when a fixed-price construction contract is contemplated. The clause…
  • FAR 12.403 Termination.
    …able Delay” requires contractors notify the contracting officer as soon as possible after commencement of any excusable delay. In most situations, this requirement should eliminate the need for a show cause notice prior to terminating a con…
  • FAR 16.603-4 Contract clauses.
    …racts when a letter contract is contemplated: (1) The clause at 52.216-23, Execution and Commencement of Work, except that this clause may be omitted from letter contracts awarded on SF 26; (2) The clause at 52.216-24, Limitation of Gover…
  • FAR 22.406-1 Policy.
    …hat shall include— (1) Ensuring that contractors and subcontractors are informed, before commencement of work, of their obligations under the labor standards clauses of the contract; (2) Adequate payroll reviews, on-site inspections, and …
  • FAR 22.1905 Enforcement of Executive Order Minimum Wage Requirements.
    …Department of Labor, shall incorporate the contract clause in the contract retroactive to commencement of performance under the contract through the exercise of any and all authority that may be needed (including, where necessary, its autho…
  • FAR 31.603 Requirements.
    …strative proceedings that result in dispositions described at 31.205-47(b)(1) through (5) commenced by: A Federal, State, local, or foreign government, for a violation of, or failure to comply with, law or regulation by the contractor or su…
  • FAR 36.213-4 Notice of award.
    …st be promptly executed and returned to the contracting officer; (e) Specify the date of commencement of work, or advise that a notice to proceed will be issued.
  • FAR 49.206-2 Bases for settlement proposals.
    …f approved in advance by the TCO as in the following examples: (i) If production has not commenced and the accumulated costs represent planning and preproduction or get ready expenses. (ii) If, under the contractor's accounting system, un…
  • FAR 52.212-4 Contract Terms and Conditions—Commercial Products and Commercial Services.
    … notify the Contracting Officer in writing as soon as it is reasonably possible after the commencement of any excusable delay, setting forth the full particulars in connection therewith, shall remedy such occurrence with all reasonable disp…
  • FAR 52.213-4 Terms and Conditions—Simplified Acquisitions (Other Than Commercial Products and Commercial Services).
    … notify the Contracting Officer in writing as soon as it is reasonably possible after the commencement of any excusable delay, setting forth the full particulars in connection therewith, shall remedy such occurrence with all reasonable disp…
  • FAR 52.232-12 Advance Payments.
    …ement, or liquidation. (iv) The service of any writ of attachment, levy of execution, or commencement of garnishment proceedings concerning the special account. (v) The commission of an act of bankruptcy. (2) If any of the events describ…
  • FAR 52.236-15 Schedules for Construction Contracts.
    …struction Contracts (APR 1984) (a) The Contractor shall, within five days after the work commences on the contract or another period of time determined by the Contracting Officer, prepare and submit to the Contracting Officer for approval …
  • FAR 52.245-1 Government Property.
    … the Government upon— (A) Issuance of the property for use in contract performance; (B) Commencement of processing of the property for use in contract performance; or (C) Reimbursement of the cost of the property by the Government, which…
  • DFARS 227.7103-5 Government rights.
    …ecognize subcontractors' interests in the data. (3) The government purpose rights period commences upon execution of the contract, subcontract, letter contract (or similar contractual instrument), contract modification, or option exercise …
  • DFARS 252.217-7003 Changes.
    …d specifications; (2) Work itemized; (3) Place of performance of the work; (4) Time of commencement or completion of the work; and (5) Any other requirement of the job order. (b) If a change causes an increase or decrease in the cost o…
  • DFARS 252.222-7003 Permit from Italian Inspectorate of Labor.
    … clause: Permit From Italian Inspectorate of Labor (JUN 1997) Prior to the date set for commencement of work and services under this contract, the Contractor shall obtain the prescribed permit from the Inspectorate of Labor having jurisdi…
  • DFARS 252.227-7013 Rights in Technical Data—Other Than Commercial Products and Commercial Services.
    …ocesses. (ii) The 5-year period, or such other period as may have been negotiated, shall commence upon execution of the contract, subcontract, letter contract (or similar contractual instrument), contract modification, or option exercise t…
  • DFARS 252.228-7006 Compliance with Spanish Laws and Insurance.
    …. (d) The Contractor agrees to represent in writing to the Contracting Officer, prior to commencement of work and not later than 15 days after the date of the Notice to Proceed, that the Contractor has obtained the required types of insura…
  • DFARS 252.235-7004 Protection of Human Subjects.
    …ble, Food and Drug Administration policies and regulations. (c) The Contractor shall not commence performance of research involving human subjects that is covered under 32 CFR Part 219 or that meets exemption criteria under 32 CFR 219.101(…

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.