# Approval and Promulgation of Air Quality Implementation Plans; State of Colorado; Trip Reduction, and Reduction of Diesel Vehicle Emissions
> **Rule** · Direct final rule. · Published 2001-09-11 · Effective 2001-11-13 · 66 FR 47083
## Document
- **Document number:** 01-22612
- **Category:** air-emissions
- **Federal Register citation:** 66 FR 47083
- **CFR reference:** 40 CFR 52
- **Publication date:** 2001-09-11
- **Effective date:** 2001-11-13
- **State:** CO
- **EPA docket:** CO-001-0048a, CO-001-0049a, CO-001-0050a
## Abstract

EPA is taking direct final action approving State Implementation Plan (SIP) revisions submitted by the Governor of Colorado on May 10, 2000. This submittal revises Colorado's Regulation 12, Reduction of Diesel Vehicle Emissions, and repeals Colorado's Regulation 9, Trip Reduction. EPA is taking this action under section 110 of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/09/11/01-22612/approval-and-promulgation-of-air-quality-implementation-plans-state-of-colorado-trip-reduction-and)
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