# Revisions to the California State Implementation Plan, San Diego Air Pollution Control District
> **Rule** · Direct final rule. · Published 2009-06-03 · Effective 2009-08-03 · 74 FR 26525
## Document
- **Document number:** E9-12791
- **Category:** air-emissions
- **Federal Register citation:** 74 FR 26525
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-06-03
- **Effective date:** 2009-08-03
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2009-0314
## Abstract

EPA is taking direct final action to approve revisions to the San Diego Air Pollution Control District (SDAPCD) portion of the California State Implementation Plan (SIP). Rule 27.1--Federal Requirements for the San Diego County Air Pollution Control District's Alternative Mobile Source Emission Reduction Program Approved on September 8, 2000, will allow stationary sources to use emission reduction credits of nitrogen oxides (NO<INF>X</INF>) generated from mobile sources as New Source Review (NSR) offsets. We are approving Rule 27.1 under authority of the Clean Air Act as amended in 1990 (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/06/03/E9-12791/revisions-to-the-california-state-implementation-plan-san-diego-air-pollution-control-district)
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