# Clean Air Act Approval and Promulgation of Air Quality Implementation Plan Revision for Colorado; Long-Term Strategy of State Implementation Plan for Class I Visibility Protection
> **Rule** · Direct final rule. · Published 2005-08-01 · Effective 2005-09-30 · 70 FR 44052
## Document
- **Document number:** 05-15054
- **Category:** air-emissions
- **Federal Register citation:** 70 FR 44052
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-08-01
- **Effective date:** 2005-09-30
- **State:** CO
- **EPA docket:** RME Docket Number R08-OAR-2004-CO-0005
## Abstract

EPA is taking direct final action approving a State Implementation Plan (SIP) revision submitted by the Governor of Colorado with a letter dated April 12, 2004. This revision replaces an August 19, 1998 submittal from the Governor and updates the Long-Term Strategy of the Visibility SIP to establish strategies, activities, and plans that constitute reasonable progress toward the National visibility goal. This action is being taken under section 110 of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/08/01/05-15054/clean-air-act-approval-and-promulgation-of-air-quality-implementation-plan-revision-for-colorado)
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