# Revisions to the California State Implementation Plan, Imperial County Air Pollution Control District
> **Rule** · Final rule. · Published 2001-09-27 · Effective 2001-10-29 · 66 FR 49295
## Document
- **Document number:** 01-24217
- **Category:** air-emissions
- **Federal Register citation:** 66 FR 49295
- **CFR reference:** 40 CFR 52
- **Publication date:** 2001-09-27
- **Effective date:** 2001-10-29
- **State:** CA
- **EPA docket:** CA242-0294
## Abstract

EPA is finalizing a disapproval of revisions to the Imperial County Air Pollution Control District's (ICAPCD) portion of the California State Implementation Plan (SIP). These revisions concern visible emissions (VE) from different sources of air pollution. We are taking final action on Rule 401--Opacity of Emissions, a local rule regulating these different emission sources. Under authority of the Clean Air Act as amended in 1990 (CAA or the Act) Act, our action maintains the existing version of this rule within the SIP.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/09/27/01-24217/revisions-to-the-california-state-implementation-plan-imperial-county-air-pollution-control-district)
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