FAR Part 43 Contract Modifications

Part Federal Acquisition Regulation

Part facts

Citation: FAR Part 43
Type: Part
Last amended: 90 FR 38208 Effective Aug 7, 2025
Text as of: FAC 2026-01
Official text: acquisition.gov

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

43.000 Scope of part
Subpart 43.1 General
- 43.101 Definitions
- 43.102 Policy
- 43.103 Types of contract modifications
- 43.104 Notification of contract changes
- 43.105 Availability of funds
- 43.106 Reserved
- 43.107 Contract clause
Subpart 43.2 Change Orders
- 43.201 General
- 43.202 Authority to issue change orders
- 43.203 Change order accounting procedures
- 43.204 Administration
- 43.205 Contract clauses
Subpart 43.3 Forms
- 43.301 Use of forms

Federal Register history

Final rule	Published	Effective
Federal Acquisition Regulation; Technical Amendments 90 FR 38208 · FAC 2025-05	Aug 7, 2025	Aug 7, 2025
Federal Acquisition Regulation: Update to Title 10 Citations 87 FR 73894 · FAC 2023-01	Dec 1, 2022	Dec 30, 2022
Federal Acquisition Regulation: Construction Contract Administration 87 FR 58227 · FAC 2022-08	Sep 23, 2022	Oct 28, 2022
Federal Acquisition Regulation: Revision of Definition of “Commercial Item”; Correction 86 FR 64407 · FAC 2022-01	Nov 18, 2021	Dec 6, 2021
Federal Acquisition Regulation: Revision of Definition of “Commercial Item” 86 FR 61017 · FAC 2022-01	Nov 4, 2021	Dec 6, 2021
Federal Acquisition Regulation: Reserve Officer Training Corps and Military Recruiting on Campus 85 FR 67619 · FAC 2021-02	Oct 23, 2020	Nov 23, 2020
Federal Acquisition Regulation: Removal of Regulations Relating to Telegraphic Communication 81 FR 83097 · FAC 2005-92	Nov 18, 2016	Dec 19, 2016
Federal Acquisition Regulation; Positive Law Codification of Title 41 79 FR 24192 · FAC 2005-73	Apr 29, 2014	May 29, 2014
Federal Acquisition Regulation; Terms of Service and Open-Ended Indemnification and Unenforceability of Unauthorized Obligations 78 FR 80382 · FAC 2005-72	Dec 31, 2013	Dec 31, 2013
Federal Acquisition Regulation; Terms of Service and Open-Ended Indemnification, and Unenforceability of Unauthorized Obligations 78 FR 37686 · FAC 2005-67	Jun 21, 2013	Jun 21, 2013
Federal Acquisition Regulation; FAR Case 2005-032, Contractor's Request for Progress Payments 74 FR 28430 · FAC 2005-33	Jun 15, 2009	Jul 15, 2009
Federal Acquisition Regulation; FAR Case 2006-023, SAFETY Act: Implementation of DHS Regulations 74 FR 2733 · FAC 2005-30	Jan 15, 2009	Feb 17, 2009
Federal Acquisition Regulation; FAR Case 2006-023, SAFETY Act: Implementation of DHS Regulations 72 FR 63027 · FAC 2005-21	Nov 7, 2007	Nov 7, 2007
Federal Acquisition Regulation; FAR Case 2004-025, Government Property 72 FR 27364 · FAC 2005-17	May 15, 2007	Jun 14, 2007
Federal Acquisition Regulation; Technical Amendments 71 FR 227 · FAC 2005-07	Jan 3, 2006	Jan 3, 2006
Federal Acquisition Regulation; Definitions 66 FR 2117 · FAC 97-22	Jan 10, 2001	Mar 12, 2001
Federal Acquisition Regulation; Time-and-Materials or Labor-Hours 65 FR 46072 · FAC 97-19	Jul 26, 2000	Sep 25, 2000
Federal Acquisition Regulation; Reorganization of FAR Part 13, Simplified Acquisition Procedures 62 FR 64916 · FAC 97-03	Dec 9, 1997	Feb 9, 1998
Federal Acquisition Regulation; Modification of Existing Contracts Under FASA and FARA 62 FR 44830 · FAC 97-01	Aug 22, 1997	Oct 21, 1997
Federal Acquisition Regulation; Procurement Integrity 62 FR 226 · FAC 90-45	Jan 2, 1997	Not on record
Federal Acquisition Regulation; Modification of Existing Contracts 61 FR 69297 · FAC 90-44	Dec 31, 1996	Jan 1, 1997
Federal Acquisition Regulation; Modification of Existing Contracts 61 FR 18915 · FAC 90-38	Apr 29, 1996	Not on record

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Quick answers

What is FAR Part 43?

FAR Part 43 is a part of the Federal Acquisition Regulation, titled "Contract Modifications".

When was FAR Part 43 last changed?

The most recent final rule on record is "Federal Acquisition Regulation; Technical Amendments" (90 FR 38208), published Aug 7, 2025 and effective Aug 7, 2025.

Are changes to FAR Part 43 proposed?

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

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