# Air Plan Approval; Michigan; Part 18 and Part 19 Revisions
> **Rule** · Direct final rule. · Published 2021-05-12 · Effective 2021-07-12 · 86 FR 25954
## Document
- **Document number:** 2021-10044
- **Category:** air-emissions
- **Federal Register citation:** 86 FR 25954
- **CFR reference:** 40 CFR 52
- **Publication date:** 2021-05-12
- **Effective date:** 2021-07-12
- **State:** MI
- **EPA docket:** EPA-R05-OAR-2020-0412
## Abstract

The Environmental Protection Agency (EPA) is approving Michigan Department of Environment, Great Lakes, and Energy (EGLE) promulgated revisions to its Part 18 Prevention of Significant Deterioration of Air Quality rule and the Part 19 New Source Review for Major Sources Impacting Nonattainment Areas rule. The revisions made to Part 18 and Part 19 were adopted to ensure consistency with Federal rule language and other parts of the Michigan air quality rules. The rule changes are administrative and are intended to provide clarity to the already approved rule language.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/05/12/2021-10044/air-plan-approval-michigan-part-18-and-part-19-revisions)
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