# Approval and Promulgation of Air Quality Implementation Plans; Indiana
> **Rule** · Direct final rule. · Published 2012-07-17 · Effective 2012-09-17 · 77 FR 41914
## Document
- **Document number:** 2012-17266
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 41914
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-07-17
- **Effective date:** 2012-09-17
- **State:** IN
- **EPA docket:** EPA-R05-OAR-2012-0406
## Abstract

EPA is approving a request submitted by the Indiana Department of Environmental Management (IDEM) on May 14, 2012, to revise the Indiana State Implementation Plan (SIP). The submission revises the Indiana Administrative Code (IAC) definition of "References to the Code of Federal Regulations," from the 2009 edition to the 2011 edition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/07/17/2012-17266/approval-and-promulgation-of-air-quality-implementation-plans-indiana)
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