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Federal Procurement

DFARS Part 251: Use of Government Sources by Contractors

Search DFARS Part 251: Use of Government Sources by Contractors government contracts, grants, and federal opportunities.

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DFARS Part 251: Use of Government Sources by Contractors

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Contract Management

DFARS Part 251: Use of Government Sources by Contractors Government Contracts & Federal Records

Federal activity overview — DFARS Part 251: Use of Government Sources by Contractors
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About DFARS Part 251: Use of Government Sources by Contractors

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Why does DFARS Part 251: Use of Government Sources by Contractors matter?

Governs when and how defense contractors may use government supply sources, including the Defense Logistics Agency supply system and government testing facilities. Addresses authorization procedures and accounting requirements for contractor use of government resources.

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Key Topics

  • •Contractor use of government supply sources
  • •Contractor use of interagency fleet management system vehicles
  • •DLA supply system access
  • •Government testing facility usage
  • •Authorization and accounting procedures

Applicability

Defense contractors authorized to use government supply sources; contractors needing access to government testing facilities.

FAR Counterpart

FAR Part 51: Use of Government Sources by Contractors

FAR

Government supply sources access.

DFARS Part 251 supplements this FAR part with defense-specific requirements.

More Contract Management Parts

FAR Part 51: Use of Government Sources by ContractorsFARPart 242: Contract Administration and Audit ServicesPart 243: Contract ModificationsPart 244: Subcontracting Policies and ProceduresPart 245: Government PropertyPart 246: Quality AssurancePart 247: TransportationPart 249: Termination of ContractsPart 250: Extraordinary Contractual Actions and the Safety ActGovernment Contracting Glossary

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Frequently Asked Questions

How do I track new opportunities for DFARS Part 251: Use of Government Sources by Contractors?
Create a free Bureauify account to save this search, set up email alerts for new postings, and track deadlines. All data is sourced from SAM.gov, USAspending, FPDS, and Grants.gov.
How often is this data updated?
Each source is refreshed on its own schedule — SAM.gov and USAspending daily or more often, FPDS and Grants.gov on their publication cadence. Every page shows the last refresh for its records.
Cite this page
Bureauify. (2026). DFARS Part 251: Use of Government Sources by Contractors — Federal Contract Intelligence. Bureauify Federal Intelligence. Retrieved , from https://bureauify.com/dfars/part-251

Data Methodology

Data Sources

Primary: Acquisition.gov DFARS, eCFR. Supplemented by 110+ federal data feeds including GAO, IG reports, Federal Register, and agency forecasts.

Refresh Frequency

  • SAM.gov opportunities: Daily
  • FPDS awards: Twice daily
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  • USAspending: Weekly

Processing

Records are normalized, deduplicated, and enriched with NAICS descriptions, agency hierarchies, and set-aside classifications. Semantic embeddings enable concept-based search beyond keyword matching.

Disclaimer

Data is sourced from official federal systems and refreshed regularly. Verify critical details on the originating agency website before making business decisions.

This dfars page aggregates data across all indexed federal sources.

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  • Small Business
  • 8(a)
  • SDVOSB
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  • HUBZone
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  • SDB
  • All Set-Asides

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