# Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Approval of Definitions for the New Source Review Regulations
> **Rule** · Final rule. · Published 1999-12-07 · Effective 2000-01-06 · 64 FR 68293
## Document
- **Document number:** 99-31543
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 68293
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-12-07
- **Effective date:** 2000-01-06
- **State:** DC
- **EPA docket:** DC032-2008
## Abstract

EPA is taking final action to approve revisions to the District of Columbia State Implementation Plan (SIP). The revisions concern the definitions for thirteen terms used in the new source review regulations. The intended effect of this action is to approve the definitions in the District Of Columbia regulations as revisions to the SIP.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/12/07/99-31543/approval-and-promulgation-of-air-quality-implementation-plans-district-of-columbia-approval-of)
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