# Approval and Promulgation of State Implementation Plans; State of Colorado Regulation Number 3: Revisions to the Air Pollutant Emission Notice Requirements and Exemptions
> **Rule** · Final rule. · Published 2011-10-03 · Effective 2011-11-02 · 76 FR 61054
## Document
- **Document number:** 2011-25292
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 61054
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-10-03
- **Effective date:** 2011-11-02
- **State:** CO
- **EPA docket:** EPA-R08-OAR-2007-0649
## Abstract

EPA is partially approving and partially disapproving State Implementation Plan (SIP) revisions regarding the Air Pollutant Emission Notice (APEN) regulations submitted by the State of Colorado on September 16, 1997, June 20, 2003, July 11, 2005, August 8, 2006 and August 1, 2007. The APEN provisions in Sections II.A. through II.D., Part A of Colorado's Regulation Number 3, specify the APEN filing requirements for stationary sources and exemptions from such requirements. This action is being taken under section 110 of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/10/03/2011-25292/approval-and-promulgation-of-state-implementation-plans-state-of-colorado-regulation-number-3)
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