# Approval of Implementation Plans of Michigan: Clean Air Interstate Rule
> **Rule** · Direct final rule. · Published 2009-08-18 · Effective 2009-10-19 · 74 FR 41637
## Document
- **Document number:** E9-19805
- **Category:** other
- **Federal Register citation:** 74 FR 41637
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-08-18
- **Effective date:** 2009-10-19
- **State:** MI
- **EPA docket:** EPA-R05-OAR-2009-0294
## Abstract

EPA is approving revisions to the Michigan State Implementation Plan (SIP) submitted on July 16, 2007, and on June 10, 2009. Together, the revisions address the requirements for an abbreviated Clean Air Interstate Rule (CAIR) SIP. EPA is also providing notice that the December 20, 2007, conditional approval of the July 16, 2007, submittal automatically converted to a disapproval.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/08/18/E9-19805/approval-of-implementation-plans-of-michigan-clean-air-interstate-rule)
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