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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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213 sections with “change order”: the first 40

  • FAR 52.243-6 Change Order Accounting.
    ….205(f), the contracting officer may insert a clause, substantially the same as follows: Change Order Accounting (APR 1984) The Contracting Officer may require change order accounting whenever the estimated cost of a change or series of r…
  • FAR 43.203 Change order accounting procedures.
    … Contractors' accounting systems are seldom designed to segregate the costs of performing changed work. Therefore, before prospective contractors submit offers, the contracting officer should advise them of the possible need to revise their…
  • 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 52.243-4 Changes.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes (JUN 2007) (a) The Contracting Officer may, at any time, without notice to the sureties, if any, by written order designated or indicated to …
  • DFARS 252.217-7003 Changes.
    As prescribed in 217.7104(a), use the following clause: Changes (DEC 1991) (a) The Contracting Officer may, at any time and without notice to the sureties, by written change order, make changes within the general scope of any job order is…
  • FAR 15.201 Exchanges with industry before receipt of proposals.
    (a) Exchanges of information among all interested parties, from the earliest identification of a requirement through receipt of proposals, are encouraged. Any exchange of information must be consistent with procurement integrity requirement…
  • 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 52.243-1 Changes—Fixed-Price.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes—Fixed-Price (AUG 1987) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make change…
  • FAR 52.243-2 Changes—Cost-Reimbursement.
    …rt the following clause. The 30-day period may be varied according to agency procedures. Changes—Cost-Reimbursement (AUG 1987) (a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make…
  • 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 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 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 8.712 Specification changes.
    …AbilityOne participating nonprofit agency and appropriate central nonprofit agency of any change in specifications or descriptions. In the absence of such written notification, the AbilityOneparticipating nonprofit agency shall furnish the …
  • 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 43.101 Definitions.
    As used in this part— Administrative change means a unilateral (see 43.103(b)) contract change, in writing, that does not affect the substantive rights of the parties (e.g., a change in the paying office or the appropriation data). Effect…
  • 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 43.205 Contract clauses.
    (a)(1) The contracting officer shall insert the clause at 52.243-1, Changes—Fixed-Price, in solicitations and contracts when a fixed-price contract for supplies is contemplated. (2) If the requirement is for services, other than architect-…
  • 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…
  • FAR 52.211-13 Time Extensions.
    …), insert the following clause: Time Extensions (SEP 2000) Time extensions for contract changes will depend upon the extent, if any, by which the changes cause delay in the completion of the various elements of construction. The change or…
  • 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 52.243-5 Changes and Changed Conditions.
    As prescribed in 43.205(e), insert the following clause: Changes and Changed Conditions (APR 1984) (a) The Contracting Officer may, in writing, order changes in the drawings and specifications within the general scope of the contract. (b…
  • 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…
  • 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…
  • 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 1.108 FAR conventions.
    …ive to the Government, including the dollar value of all options. (d) Application of FAR changes to solicitations and contracts. Unless otherwise specified— (1) FAR changes apply to solicitations issued on or after the effective date of t…
  • FAR 4.1102 Policy.
    …ns of non-uniform contract formats and agreements, and all corresponding forms and data exchanges. Contracting officers shall make no changes to the data retrieved from SAM. (d)(1)(i) If a contractor has legally changed its business name o…
  • 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 16.703 Basic ordering agreements.
    … administrative lead-time, inventory investment, and inventory obsolescence due to design changes. (c) Limitations. A basic ordering agreement shall not state or imply any agreement by the Government to place future contracts or orders wit…
  • 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 31.205-6 Compensation for personal services.
    … or within a reasonable period after it, an opportunity to review the allowability of the changes. (5) Costs that are unallowable under other paragraphs of this Subpart 31.2 are not allowable under this subsection 31.205-6 solely on the ba…
  • 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 (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.