# Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Transportation Conformity Regulations
> **Rule** · Direct final rule. · Published 2010-05-28 · Effective 2010-07-27 · 75 FR 29894
## Document
- **Document number:** 2010-12929
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 29894
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-05-28
- **Effective date:** 2010-07-27
- **State:** DC
- **EPA docket:** EPA-R03-OAR-2010-0320
## Abstract

EPA is taking direct final action to approve revisions to the District of Columbia State Implementation Plan (SIP). The revisions establish general and transportation conformity regulations for the District of Columbia. EPA is approving these revisions in accordance with the requirements of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/05/28/2010-12929/approval-and-promulgation-of-air-quality-implementation-plans-district-of-columbia-transportation)
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