# Revisions to the California State Implementation Plan, South Coast Air Quality Management District
> **Rule** · Final rule. · Published 2008-12-18 · Effective 2009-01-20 · 73 FR 76947
## Document
- **Document number:** E8-29641
- **Category:** air-emissions
- **Federal Register citation:** 73 FR 76947
- **CFR reference:** 40 CFR 52
- **Publication date:** 2008-12-18
- **Effective date:** 2009-01-20
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2008-0537
## Abstract

EPA is finalizing approval of revisions to the South Coast Air Quality Management District portion of the California State Implementation Plan (SIP). These revisions were proposed in the Federal Register on July 24, 2008 and concern the District's analysis of whether its rules met reasonably available control technology (RACT) under the 8-hour ozone National Ambient Air Quality Standards (NAAQS). We are approving the analysis under the Clean Air Act as amended in 1990 (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/12/18/E8-29641/revisions-to-the-california-state-implementation-plan-south-coast-air-quality-management-district)
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