FAR and DFARS › FAR Part 50
FAR Part 50: Extraordinary Contractual Actions and the Safety Act
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.
In plain English
FAR Part 50 covers extraordinary contractual actions under Public Law 85-804 and the SAFETY Act. It allows agencies to amend or modify contracts to facilitate national defense and provides liability protections for anti-terrorism technologies. Contractors should understand these procedures if they seek relief for losses or offer anti-terrorism technologies.
Key rules
- Agencies may use Pub. L. 85-804 authority to enter into, amend, or modify contracts without regard to other laws when necessary to facilitate national defense. (50.101-1)
- Contract adjustments may be made only when the action will facilitate national defense, and losses alone are not sufficient basis. (50.103-1, 50.102-3)
- Contractors must submit a written request for adjustment to the contracting officer with specific details and justification. (50.103-3)
- The approving authority must issue a Memorandum of Decision for each request, and contracts must include a citation of Pub. L. 85-804 and E.O. 10789. (50.103-6, 50.103-7)
- Indemnification for unusually hazardous or nuclear risks requires a contractor request and approval, and the clause at 52.250-1 must be inserted in the contract. (50.104-3, 50.104-4)
- The SAFETY Act encourages development of anti-terrorism technologies and provides liability protections for qualified technologies. (50.203)
- Contracting officers may authorize offers contingent upon SAFETY Act designation or certification only under specific conditions, such as DHS issuing a pre-qualification designation notice. (50.205-3)
- Solicitations must include specific provisions regarding SAFETY Act applicability, such as 52.250-2 or 52.250-3, based on DHS determinations. (50.206)
Who does what
- Investigate contractor requests for adjustment thoroughly and obtain necessary facts and evidence.
- Sign and date a Memorandum of Decision when approving or denying a request.
- Insert required contract clauses, such as 52.250-1 for indemnification or SAFETY Act provisions.
- Submit a written request for contract adjustment to the contracting officer with precise details and justification.
- Provide supporting information and evidence as requested by the contracting officer.
- For SAFETY Act protections, apply to DHS and provide necessary information.
- Maintain complete records of all actions taken under Subpart 50.1.
- Delegate authority only to appropriate levels, with limitations on certain approvals.
- Consult with DHS on SAFETY Act applicability and encourage offerors to seek protections.
In practice
- If you are experiencing losses on a defense contract that threaten your ability to perform, you may request a contract adjustment under Pub. L. 85-804, but you must show that the adjustment will facilitate national defense.
- For contracts involving anti-terrorism technologies, consider seeking SAFETY Act designation or certification to obtain liability protections, and be aware that solicitations may include provisions contingent on such protections.
- When requesting indemnification for unusually hazardous or nuclear risks, submit a detailed request to the contracting officer and be prepared to provide insurance information.
Common pitfalls
- Assuming that any loss under a contract justifies a contract adjustment; the regulation states that losses alone are not sufficient basis.
- Failing to include the required citation of Pub. L. 85-804 and E.O. 10789 in contracts modified under these authorities.
- Not consulting with DHS on questionable SAFETY Act applicability, which could lead to improper solicitation provisions.
Written by AI from this part's codified text (2026-10-04); cited sections are checked against the part. A guide, not legal advice: the regulation text, the solicitation and your contract rule.
Rule changes for FAR Part 50
- Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds ↗ · final rule 2025-08-27 · effective 2025-10-01
- Federal Acquisition Regulation: Preventing Organizational Conflicts of Interest in Federal Acquisition ↗ · proposed 2025-01-15 · comments due 2025-03-17
- Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds ↗ · proposed 2024-11-29 · comments due 2025-01-28
- Federal Acquisition Regulation: Limitation of Authority Regarding Extraordinary Contractual Actions ↗ · final rule 2024-07-30 · effective 2024-08-29
Subparts and sections
Subpart 50.1: Extraordinary Contractual Actions
- 50.100 Definitions.
- 50.101 General.
- 50.101-1 Authority.
- 50.101-2 Policy.
- 50.101-3 Records.
- 50.102 Delegation of and limitations on exercise of authority.
- 50.102-1 Delegation of authority.
- 50.102-2 Contract adjustment boards.
- 50.102-3 Limitations on exercise of authority.
- 50.103 Contract adjustments.
- 50.103-1 General.
- 50.103-2 Types of contract adjustment.
- 50.103-3 Contract adjustment.
- 50.103-4 Facts and evidence.
- 50.103-5 Processing cases.
- 50.103-6 Disposition.
- 50.103-7 Contract requirements.
- 50.104 Residual powers.
- 50.104-1 Standards for use.
- 50.104-2 General.
- 50.104-3 Special procedures for unusually hazardous or nuclear risks.
- 50.104-4 Contract clause.
Subpart 50.2: Support Anti-terrorism by Fostering Effective Technologies Act of 2002
- 50.200 Scope of subpart.
- 50.201 Definitions.
- 50.202 Authorities.
- 50.203 General.
- 50.204 Policy.
- 50.205 Procedures.
- 50.205-1 SAFETY Act Considerations.
- 50.205-2 Pre-qualification designation notice.
- 50.205-3 Authorization of offers contingent upon SAFETY Act designation or certification before contract award.
- 50.205-4 Authorization of awards made presuming SAFETY Act designation or certification after contract award.
- 50.206 Solicitation provisions and contract clause.
← Part 49: Termination of ContractsPart 51: Use of Government Sources by Contractors →
All FAR parts
- Part 1 Federal Acquisition Regulations System
- Part 2 Definitions of Words and Terms
- Part 3 Improper Business Practices and Personal Conflicts of Interest
- Part 4 Administrative and Information Matters
- Part 5 Publicizing Contract Actions
- Part 6 Competition Requirements
- Part 7 Acquisition Planning
- Part 8 Required Sources of Supplies and Services
- Part 9 Contractor Qualifications
- Part 10 Market Research
- Part 11 Describing Agency Needs
- Part 12 Acquisition of Commercial Products and Commercial Services
- Part 13 Simplified Acquisition Procedures
- Part 14 Sealed Bidding
- Part 15 Contracting by Negotiation
- Part 16 Types of Contracts
- Part 17 Special Contracting Methods
- Part 18 Emergency Acquisitions
- Part 19 Small Business Programs
- Part 22 Application of Labor Laws to Government Acquisitions
- Part 23 Environment, Sustainable Acquisition, and Material Safety
- Part 24 Protection of Privacy and Freedom of Information
- Part 25 Foreign Acquisition
- Part 26 Other Socioeconomic Programs
- Part 27 Patents, Data, and Copyrights
- Part 28 Bonds and Insurance
- Part 29 Taxes
- Part 30 Cost Accounting Standards Administration
- Part 31 Contract Cost Principles and Procedures
- Part 32 Contract Financing
- Part 33 Protests, Disputes, and Appeals
- Part 34 Major System Acquisition
- Part 35 Research and Development Contracting
- Part 36 Construction and Architect-engineer Contracts
- Part 37 Service Contracting
- Part 38 Federal Supply Schedule Contracting
- Part 39 Acquisition of Information Technology
- Part 40 Information Security and Supply Chain Security
- Part 41 Acquisition of Utility Services
- Part 42 Contract Administration and Audit Services
- Part 43 Contract Modifications
- Part 44 Subcontracting Policies and Procedures
- Part 45 Government Property
- Part 46 Quality Assurance
- Part 47 Transportation
- Part 48 Value Engineering
- Part 49 Termination of Contracts
- Part 50 Extraordinary Contractual Actions and the Safety Act
- Part 51 Use of Government Sources by Contractors
- Part 52 Solicitation Provisions and Contract Clauses
- Part 53 Forms
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗.