DFARS Part 243 Contract Modifications

Part Defense Federal Acquisition Regulation Supplement

Part facts

Citation: DFARS Part 243
Type: Part
Supplements: FAR Part 43 Contract Modifications
Last amended: 89 FR 60830 Effective Jul 29, 2024
Text as of: DFARS Change May 7, 2026
Official text: acquisition.gov

Text from acquisition.gov. Federal Register history from the Federal Register's records of the rules that amended this part.

Subpart 243.1 GENERAL
- 243.107 Reserved
- 243.170 Identification of foreign military sale (FMS) requirements
- 243.171 Obligation or deobligation of funds
- 243.172 Application of modifications
Subpart 243.2 Change Orders
- 243.204 Administration
- 243.205 Contract clauses

Federal Register history

Final rule	Published	Effective
Defense Federal Acquisition Regulation Supplement; Technical Amendments 89 FR 60830 · Docket DARS-2024-0001	Jul 29, 2024	Jul 29, 2024
Defense Federal Acquisition Regulation Supplement; Technical Amendments 88 FR 73234 · Docket DARS-2023-0001	Oct 25, 2023	Oct 30, 2023
Defense Federal Acquisition Regulation Supplement: Technical Amendments 88 FR 17355 · Docket DARS-2023-0001	Mar 22, 2023	Mar 22, 2023
Defense Federal Acquisition Regulation Supplement: Definition of “Commercial Item” (DFARS Case 2018-D066) 88 FR 6578 · Docket DARS-2022-0004	Jan 31, 2023	Jan 31, 2023
Defense Federal Acquisition Regulation Supplement: Undefinitized Contract Action Definitization (DFARS Case 2015-D024) 83 FR 30584 · Docket DARS-2016-0026	Jun 29, 2018	Jun 29, 2018
Defense Federal Acquisition Regulation Supplement: Technical Amendments 82 FR 61479 · Docket DARS-2017-0022	Dec 28, 2017	Dec 28, 2017
Defense Federal Acquisition Regulation Supplement: Uniform Procurement Identification (DFARS Case 2015-D011) 81 FR 9783 · Docket DARS-2015-0025	Feb 26, 2016	Feb 26, 2016
Defense Federal Acquisition Regulation Supplement: Solicitation Provisions and Contract Clauses for Acquisition of Commercial Items (DFARS Case 2011-D056) 78 FR 37980 · 0750-AH63	Jun 25, 2013	Jun 25, 2013
Defense Federal Acquisition Regulation Supplement: Title 41 Positive Law Codification-Further Implementation (DFARS Case 2012-D003) 77 FR 35879 · 0750-AH55	Jun 15, 2012	Not on record
Defense Federal Acquisition Regulation Supplement: Order of Application for Modifications (DFARS Case 2012-D002) 77 FR 30367 · 0750-AH56	May 22, 2012	May 22, 2012
Defense Federal Acquisition Regulation Supplement; Technical Amendments 76 FR 76318	Dec 7, 2011	Dec 7, 2011
Defense Federal Acquisition Regulation Supplement; Positive Law Codification of Title 41 U.S.C. (DFARS Case 2011-D036) 76 FR 58137 · 0750-AG38	Sep 20, 2011	Sep 20, 2011
Defense Federal Acquisition Regulation Supplement; Management of Unpriced Change Orders 75 FR 48276 · DFARS Case 2008-D034	Aug 10, 2010	Aug 10, 2010
Defense Federal Acquisition Regulation Supplement; Contract Modifications 70 FR 67921 · DFARS Case 2003-D024	Nov 9, 2005	Not on record
Defense Federal Acquisition Regulation Supplement; Unique Item Identification and Valuation 70 FR 20831 · DFARS Case 2003-D081	Apr 22, 2005	Apr 22, 2005
Defense Federal Acquisition Regulation Supplement; Unique Item Identification and Valuation 68 FR 60861 · DFARS Case 2003-D081	Oct 24, 2003	Not on record
Defense Federal Acquisition Regulation Supplement; Unique Item Identification and Valuation 68 FR 58631 · DFARS Case 2003-D081	Oct 10, 2003	Jan 1, 2004
Defense Federal Acquisition Regulation Supplement; Institutions of Higher Education 67 FR 49253 · DFARS Case 99-D303	Jul 30, 2002	Not on record
Defense Federal Acquisition Regulation Supplement; Cancellation of MIL-STD-973, Configuration Management 66 FR 49865 · DFARS Case 2001-D001	Oct 1, 2001	Not on record
Defense Federal Acquisition Regulation Supplement; Institutions of Higher Education 65 FR 2056 · DFARS Case 99-D303	Jan 13, 2000	Jan 13, 2000
Defense Federal Acquisition Regulation Supplement; Miscellaneous Amendments; Correction 63 FR 17124 · Defense Acquisition Circular 91-13	Apr 8, 1998	Mar 9, 1998
Defense Federal Acquisition Regulation Supplement; Certification of Requests for Equitable Adjustment 62 FR 37146 · DFARS Case 97-D302	Jul 11, 1997	Not on record
Defense Federal Acquisition Regulation Supplement; Institutions of Higher Education 61 FR 25407 · DFARS Case 96-D305	May 21, 1996	Not on record
Defense Federal Acquisition Regulation Supplement; Sequence of Progress Payments and Contract Modifications 60 FR 34467	Jul 3, 1995	Not on record

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Quick answers

What is DFARS Part 243?

DFARS Part 243 is a part of the Defense Federal Acquisition Regulation Supplement, titled "Contract Modifications".

When was DFARS Part 243 last changed?

The most recent final rule on record is "Defense Federal Acquisition Regulation Supplement; Technical Amendments" (89 FR 60830), published Jul 29, 2024 and effective Jul 29, 2024.

Are changes to DFARS Part 243 proposed?

No proposed rule from the last 3 years is waiting on a final rule.

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