# Federal Acquisition Regulation; Accounting for Unallowable Costs
> **US Department of Defense** · Final rule. · Published 2005-09-30 · Effective 2005-10-31 · 70 FR 57463
## Document
- **Document number:** 05-19476
- **Category:** other
- **Sub-agency:** US Department of Defense
- **Federal Register citation:** 70 FR 57463
- **CFR reference:** 48 CFR 31
- **Publication date:** 2005-09-30
- **Effective date:** 2005-10-31
- **DOD docket:** FAC 2005-06
## 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) by revising language regarding accounting for unallowable costs. The final rule adds language which provides specific criteria on the use of statistical sampling as a method to identify unallowable costs, including the applicability of penalties for failure to exclude certain projected unallowable costs. The final rule also revises the language regarding advance agreements by adding statistical sampling methods as an example for which advance agreements between the contracting officers and contractors may be appropriate.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/09/30/05-19476/federal-acquisition-regulation-accounting-for-unallowable-costs)
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