# Federal Acquisition Regulation; FAR Case 2005-007, Central Contractor Registration-Taxpayer Identification Number (TIN) Validation
> **US Department of Defense** · Final rule. · Published 2006-06-28 · Effective 2006-07-28 · 71 FR 36923
## Document
- **Document number:** 06-5711
- **Category:** other
- **Sub-agency:** US Department of Defense
- **Federal Register citation:** 71 FR 36923
- **CFR reference:** 48 CFR 2
- **Publication date:** 2006-06-28
- **Effective date:** 2006-07-28
- **DOD docket:** FAC 2005-10
## Abstract

The Civilian Agency Acquisition Council and the Defense Acquisition Regulations Council (Councils) have agreed on a final rule amending the Federal Acquisition Regulation (FAR) to include the process of validating a Central Contractor Registration (CCR) registrant's taxpayer identification number (TIN) with the Internal Revenue Service (IRS) to improve the quality of data in the Federal procurement system. Additionally, the amendment removes outdated language requiring modifications of contracts prior to December 31, 2003, regarding CCR.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/06/28/06-5711/federal-acquisition-regulation-far-case-2005-007-central-contractor-registration-taxpayer)
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