# Approval and Promulgation of State Implementation Plans: Alaska
> **Rule** · Final rule. · Published 2012-01-10 · Effective 2012-02-09 · 77 FR 1414
## Document
- **Document number:** 2012-341
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 1414
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-01-10
- **Effective date:** 2012-02-09
- **State:** AK
- **EPA docket:** EPA-R10-OAR-2010-0917
## Abstract

EPA is taking final action to approve revisions to the Alaska State Implementation Plan (SIP) relating to the motor vehicle inspection and maintenance program (I/M) for control of carbon monoxide (CO) in Anchorage. The State of Alaska (the State) submitted a September 29, 2010, SIP modification that would discontinue the I/M program in Anchorage as an active control measure in the SIP and shift it to a contingency measure. EPA is approving the submittal because it satisfies the requirements of the Clean Air Act (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/01/10/2012-341/approval-and-promulgation-of-state-implementation-plans-alaska)
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