# 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 2006-01-24 · Effective 2006-03-27 · 71 FR 3773
## Document
- **Document number:** 06-630
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 3773
- **CFR reference:** 40 CFR 52
- **Publication date:** 2006-01-24
- **Effective date:** 2006-03-27
- **State:** CO
- **EPA docket:** EPA-R08-OAR-2005-CO-0002
## Abstract

EPA is taking direct final action approving a State Implementation Plan (SIP) revision submitted by the Governor of Colorado with a letter dated March 24, 2005. This revision updates the Long-Term Strategy of the Visibility SIP to establish strategies, activities, and monitoring 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/2006/01/24/06-630/clean-air-act-approval-and-promulgation-of-air-quality-implementation-plan-revision-for-colorado)
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