# Approval and Promulgation of Air Quality Implementation Plans; State of Colorado
> **Rule** · Final rule. · Published 2003-01-31 · Effective 2003-03-03 · 68 FR 4933
## Document
- **Document number:** 03-2173
- **Category:** air-emissions
- **Federal Register citation:** 68 FR 4933
- **CFR reference:** 40 CFR 52
- **Publication date:** 2003-01-31
- **Effective date:** 2003-03-03
- **State:** CO
- **EPA docket:** SIP NO. CO-001-0068
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the Governor of Colorado on November 5, 1999. The November 5, 1999 submittal exempts military training exercises at the United States Army Installation Fort Carson and United States Army Pinon Canyon Maneuver Site (PCMS) from opacity limits. The intended effect of this action is to allow the use of smoke and obscurants for military training exercises when operated under applicable requirements. This action is being taken under section 110 of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/01/31/03-2173/approval-and-promulgation-of-air-quality-implementation-plans-state-of-colorado)
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