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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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100 sections with “change orders”: the first 40

  • FAR 19.502-11 Solicitation notice regarding administration of change orders for construction.
    …ent to provide a notice to offerors regarding definitization of equitable adjustments for change orders under construction contracts.
  • FAR 43.202 Authority to issue change orders.
    Change orders shall be issued by the contracting officer except when authority is delegated to an administrative contracting officer (see 42.202(c)).
  • DFARS 243.205-72 Unpriced change orders.
    See the clause prescriptions at 217.7406 for all unpriced change orders with an estimated value exceeding $5 million.
  • DFARS 243.204-70 Definitization of change orders.
  • 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 52.243-7 Notification of Changes.
    As prescribed in 43.107, insert the following clause: Notification of Changes (JAN 2017) (a) Definitions. Contracting Officer, as used in this clause, does not include any representative of the Contracting Officer. Specifically Authoriz…
  • 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 42.302 Contract administration functions.
    …g cancellation charges under multi-year contracts. (26) Process and execute novation and change of name agreements under subpart 42.12. (27) Perform property administration (see part 45). (28) Perform necessary screening, redistribution,…
  • FAR 43.103 Types of contract modifications.
    … are used to— (1) Make negotiated equitable adjustments resulting from the issuance of a change order; (2) Definitize letter contracts; and (3) Reflect other agreements of the parties modifying the terms of contracts. (b) Unilateral. A …
  • FAR 43.201 General.
    (a) Generally, Government contracts contain a changes clause that permits the contracting officer to make unilateral changes, in designated areas, within the general scope of the contract. These are accomplished by issuing written change or…
  • FAR 43.204 Administration.
    (a) Change order documentation. When change orders are not forward priced, they require two documents: the change order and a supplemental agreement reflecting the resulting equitable adjustment in contract terms. If an equitable adjustment…
  • FAR 43.301 Use of forms.
    …actions processed under part 15) be used for— (i) Any amendment to a solicitation; (ii) Change orders issued under the Changes clause of the contract; (iii) Any other unilateral contract modification issued under a contract clause author…
  • DFARS 217.7401 Definitions.
    …s or services. (2) It includes task orders and delivery orders. (3) It does not include change orders, administrative changes, funding modifications, or any other contract modifications that are within the scope and under the terms of the…
  • DFARS 252.217-7007 Payments.
    … that progress payments be based on the price of the job order as adjusted as a result of change orders under the Changes clause of the Master Agreement. If the Contracting Officer does not so direct— (1) Payments of any increases shall be…
  • FAR 36.211 Distribution of advance notices and solicitations.
    …de certain information regarding the agency's definitization of equitable adjustments for change orders under construction contracts. This information includes: (1) A description of agency policies or procedures, in addition to that outlin…
  • FAR 2.101 Definitions.
    …lause. The alternate version of a provision or clause is the basic provision or clause as changed by the addition, deletion, or substitution (see 52.105(a)). Architect-engineer services, as defined in 40 U.S.C. 1102, means— (1) Profession…
  • FAR 5.205 Special situations.
    …he GPE and the Federal Register, indicating the agency's intention to sponsor an FFRDC or change the basic purpose and mission of an FFRDC. The notice must indicate the scope and nature of the effort to be performed and request comments. No…
  • FAR 14.407-4 Mistakes after award.
    …of the next lowest acceptable bid under the original invitation for bids; or (3) That no change shall be made in the contract as awarded, if the evidence does not warrant a determination under subparagraphs (1) or (2) above. (c) Determina…
  • FAR 19.301-2 Rerepresentation by a contractor that represented its status as a small business concern.
    …representation for an order issued under an unrestricted multiple-award contract does not change the size or socioeconomic status representation for the contract. (e) Size status change. A change in size status does not change the terms an…
  • FAR 30.001 Definitions.
    …ntractor or subcontractor— (1) Used one cost accounting practice to estimate costs and a changed cost accounting practice to accumulate and report costs under the contract or subcontract; or (2) Used a noncompliant practice for purposes o…
  • FAR 42.1204 Applicability of novation agreements.
    …, or formation of a partnership. (b) A novation agreement is unnecessary when there is a change in the ownership of a contractor as a result of a stock purchase, with no legal change in the contracting party, and when that contracting part…
  • FAR 48.001 Definitions.
    … Acquisition savings means savings resulting from the application of a value engineering change proposal (VECP) to contracts awarded by the same contracting office of its successor for essentially the same unit. Acquisition savings include…
  • FAR 52.212-4 Contract Terms and Conditions—Commercial Products and Commercial Services.
    … the defect was discovered or should have been discovered; and (2) before any substantial change occurs in the condition of the item, unless the change is due to the defect in the item. (b) Assignment. The Contractor or its assignee may as…
  • FAR 52.225-19 Contractor Personnel in a Designated Operational Area or Supporting a Diplomatic or Consular Mission Outside the United States.
    …d personal effects of all U.S. citizens upon the request of the Department of State. (p) Changes. In addition to the changes otherwise authorized by the Changes clause of this contract, the Contracting Officer may, at any time, by written …
  • FAR 52.230-6 Administration of Cost Accounting Standards.
    …ntractor or subcontractor— (1) Used one cost accounting practice to estimate costs and a changed cost accounting practice to accumulate and report costs under the contract or subcontract; or (2) Used a noncompliant practice for purposes o…
  • FAR 52.248-1 Value Engineering.
    …) General. The Contractor is encouraged to develop, prepare, and submit value engineering change proposals (VECP's) voluntarily. The Contractor shall share in any net acquisition savings realized from accepted VECP's, in accordance with the…
  • DFARS 217.7406 Contract clauses.
    …ntracts; (5) Any other type of contract providing for the use of UCAs; and (6) Unpriced change orders with an estimated value exceeding $5 million. (b)(1) Use the clause at 252.217-7027, Contract Definitization, in— (i) All UCAs; (ii) …
  • DFARS 237.7204 Format and clauses for educational service agreements.
    …nt annually before the anniversary of its effective date for the purpose of incorporating changes required by statutes, executive orders, the Federal Acquisition Regulation, or the Defense Federal Acquisition Regulation Supplement. Changes …
  • DFARS 243.204-70-1 Scope.
    (a) This subsection applies to unpriced change orders with an estimated value exceeding $5 million. (b) Unpriced change orders for foreign military sales and special access programs are not subject to this section, but the contracting offi…
  • DFARS 243.204-70-3 Definitization schedule.
    (a) Unpriced change orders shall contain definitization schedules that provide for definitization by the earlier of— (1) The date that is 180 days after issuance of the change order (this date may be extended but may not exceed the date th…
  • DFARS 243.204-70-5 Exceptions.
    … The limitations in 243.204-70-2, 243.204-70-3, and 243.204-70-4 do not apply to unpriced change orders for the purchase of initial spares. (b) The limitations in 243.204-70-4(a) do not apply to unpriced change orders for ship construction…
  • DFARS 243.204-70-7 Plans and reports.
    To provide for enhanced management and oversight of unpriced change orders, departments and agencies shall— (a) Include in the Consolidated Undefinitized Contract Action (UCA) Management Plan required by 217.7405, the actions planned and t…
  • DFARS 252.225-7040 Contractor Personnel Supporting U.S. Armed Forces Deployed Outside the United States.
    … accurate, up-to-date information throughout the deployment for all Contractor personnel. Changes to status of individual Contractor personnel relating to their in-theater arrival date and their duty location, to include closing out the dep…
  • DFARS 252.239-7004 Orders for Facilities and Services.
    …sition shall be competitive, if practicable. (i) If at any time the Government defers or changes its orders for any of the services but does not cancel or terminate them, the amount paid or payable to the Contractor for the services deferr…
  • FAR 8.705-4 Compliance with orders.
    (a) The central nonprofit agency shall inform the ordering office of changes in lead time experienced by its AbilityOne participating nonprofit agencies to minimize requests for extensions once the ordering office places an order. (b) The …
  • FAR 8.707 Prices.
    …ish prices without prior coordination with the responsible contracting office. (d) Price changes shall normally apply to all orders received by the AbilityOne participating nonprofit agency on or after the effective date of the change. In …
  • FAR 32.503-6 Suspension or reduction of payments.
    …ble portion of the contractor's accounting system shall be suspended) until the necessary changes have been made. (2) If the contractor fails to comply with the contract without fault or negligence, the contracting officer will not take ac…
  • FAR 52.204-28 Federal Acquisition Supply Chain Security Act Orders—Federal Supply Schedules, Governmentwide Acquisition Contracts, and Multi-Agency Contracts.
    … during the performance of the contract, the Contractor shall promptly make any necessary changes or modifications to remove any covered article or any product or service produced or provided by a source that is subject to an applicable Gov…
  • FAR 52.204-30 Federal Acquisition Supply Chain Security Act Orders—Prohibition.
    … during the performance of the contract, the Contractor shall promptly make any necessary changes or modifications to remove any product or service produced or provided by a source that is subject to an applicable FASCSA order. (e) Subcont…
  • FAR 52.232-16 Progress Payments.
    …quidated progress payments accordingly. The Government reserves the right to unilaterally change from the ordinary liquidation rate to an alternate rate when deemed appropriate for proper contract financing. (c) Reduction or suspension. Th…

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.