DFARS Part 203 Improper Business Practices and Personal Conflicts of Interest

Part Defense Federal Acquisition Regulation Supplement

Part facts

Citation
DFARS Part 203
Type
Part
Supplements
FAR Part 3 Improper Business Practices and Personal Conflicts of Interest
Last amended
90 FR 41483 Effective Oct 1, 2025
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.

Contents

Federal Register history

Final rule Published Effective
Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2024-D002) 90 FR 41483 · Docket DARS-2024-0039
Defense Federal Acquisition Regulation Supplement: Inapplicability of Additional Defense-Unique Laws and Certain Non-Statutory DFARS Clauses to Commercial Item Contracts (DFARS Case 2018-D074) 89 FR 90233 · Docket DARS-2023-0043
Defense Federal Acquisition Regulation Supplement; Technical Amendments 88 FR 73234 · Docket DARS-2023-0001
Defense Federal Acquisition Regulation Supplement: Defense Commercial Solutions Opening (DFARS Case 2022-D006) 88 FR 55937 · Docket DARS-2023-0002
Defense Federal Acquisition Regulation Supplement: Definition of “Commercial Item” (DFARS Case 2018-D066) 88 FR 6578 · Docket DARS-2022-0004
Defense Federal Acquisition Regulation Supplement: Prohibition on Award to Contractors That Require Certain Nondisclosure Agreements (DFARS Case 2021-D018) 87 FR 65510 · Docket DARS-2022-0013
Defense Federal Acquisition Regulation Supplement; Technical Amendments 87 FR 59028 · Docket DARS-2022-0001
Defense Federal Acquisition Regulation Supplement: Technical Amendments 86 FR 59869 · Docket DARS-2021-0001
Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2019-D036) 85 FR 61502 · Docket DARS-2020-0002
Defense Federal Acquisition Regulation Supplement: Modification of DFARS Clauses Related to the Display of Hotline Posters (DFARS Case 2019-D011) 84 FR 39201 · Docket DARS-2019-0042
Defense Federal Acquisition Regulation Supplement: Display of Hotline Posters (DFARS Case 2016-D018) 81 FR 73005 · Docket DARS-2016-0016
Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2014-D025) 80 FR 36903 · 0750-AI43
Defense Federal Acquisition Regulation Supplement: Further Implementation of Trafficking in Persons Policy (DFARS Case 2013-D007) 80 FR 4999 · 0750-AH93
Defense Federal Acquisition Regulation Supplement: Deletion of Certification Requirement Regarding Separation of Duties of Senior Leaders (DFARS Case 2015-D003) 79 FR 73487 · 0750-AI48
Defense Federal Acquisition Regulation Supplement; Technical Amendments 79 FR 23278
Defense Federal Acquisition Regulation Supplement: Enhancement of Contractor Employee Whistleblower Protections (DFARS Case 2013-D010) 79 FR 11336 · 0750-AH97
Defense Federal Acquisition Regulation Supplement: Enhancement of Contractor Employee Whistleblower Protections (DFARS Case 2013-D010) 78 FR 59851 · 0750-AH97
Defense Federal Acquisition Regulation Supplement: Solicitation Provisions and Contract Clauses for Acquisition of Commercial Items (DFARS Case 2011-D056) 78 FR 37980 · 0750-AH63
Defense Federal Acquisition Regulation Supplement; Technical Amendments 77 FR 76936
Defense Federal Acquisition Regulation Supplement: Title 41 Positive Law Codification-Further Implementation (DFARS Case 2012-D003) 77 FR 35879 · 0750-AH55 Not on record
Defense Federal Acquisition Regulation Supplement; Technical Amendment 77 FR 19128
Defense Federal Acquisition Regulation Supplement: Representation Relating to Compensation of Former DoD Officials (DFARS Case 2010-D020) 76 FR 71826 · 0750-AG99
Defense Federal Acquisition Regulation Supplement; Display of DoD Inspector General Fraud Hotline Posters 76 FR 57671 · DFARS Case 2010-D026
Defense Federal Acquisition Regulation Supplement; Agency Office of the Inspector General (DFARS Case 2011-D006) 76 FR 32840 · 0750-AG97
Defense Federal Acquisition Regulation Supplement; DoD Office of the Inspector General Address (DFARS Case 2010-D015) 75 FR 59101
Defense Federal Acquisition Regulation Supplement; Whistleblower Protections for Contractor Employees (DFARS Case 2008-D012) 74 FR 59914 · 0750-AG09
Defense Federal Acquisition Regulation Supplement; Senior DoD Officials Seeking Employment With Defense Contractors (DFARS Case 2008-D007) 74 FR 59913 · 0750-AG07
Defense Federal Acquisition Regulation Supplement; DoD Inspector General Address (DFARS Case 2009-D001) 74 FR 53412 · 0750-AG34
Defense Federal Acquisition Regulation Supplement; Separation of Senior Roles in Source Selection (DFARS Case 2008-D037) 74 FR 2407 · 0750-AG21
Defense Federal Acquisition Regulation Supplement; Whistleblower Protections for Contractor Employees (DFARS Case 2008-D012) 74 FR 2410 · 0750-AG09
Defense Federal Acquisition Regulation Supplement; Senior DoD Officials Seeking Employment With Defense Contractors (DFARS Case 2008-D007) 74 FR 2408 · 0750-AG07
Defense Federal Acquisition Regulation Supplement; Conforming Changes-Standards of Conduct and Extraordinary Contractual Actions (DFARS Case 2008-D004) 73 FR 46814 · 0750-AG01
Defense Federal Acquisition Regulation Supplement; Acquisition Integrity (DFARS Case 2006-D044) 72 FR 20757 · 0750-AF60 Not on record
Defense Federal Acquisition Regulation Supplement; Technical Amendments 71 FR 14099
Defense Federal Acquisition Regulation Supplement; Improper Business Practices and Contractor Qualifications Relating to Debarment, Suspension, and Business Ethics 69 FR 74989 · DFARS Case 2003-D012 Not on record
Defense Federal Acquisition Regulation Supplement; Technical Amendments 65 FR 39704 Not on record
Defense Federal Acquisition Regulation Supplement; Debarment Investigation and Reports 64 FR 62984 · DFARS Case 99-D013
Defense Federal Acquisition Regulation Supplement; Employment Prohibition on Persons Convicted of Fraud or Other Defense-Contract- Related Felonies 64 FR 14397 · DFARS Case 97-D020
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Quick answers

What is DFARS Part 203?

DFARS Part 203 is a part of the Defense Federal Acquisition Regulation Supplement, titled "Improper Business Practices and Personal Conflicts of Interest".

When was DFARS Part 203 last changed?

The most recent final rule on record is "Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2024-D002)" (90 FR 41483), published Aug 25, 2025 and effective Oct 1, 2025.

Are changes to DFARS Part 203 proposed?

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

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