# Approval and Promulgation of Air Quality Implementation Plans; Alabama; Update to Materials Incorporated by Reference
> **Rule** · Final rule; notice of administrative change. · Published 2009-03-18 · Effective 2009-03-18 · 74 FR 11483
## Document
- **Document number:** E9-5732
- **Category:** air-emissions
- **Federal Register citation:** 74 FR 11483
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-03-18
- **Effective date:** 2009-03-18
- **State:** AL
- **EPA docket:** AL-200822
## Abstract

EPA is publishing this action to provide the public with notice of the update to the Alabama State Implementation Plan (SIP) compilation. In particular, materials submitted by Alabama that are incorporated by reference (IBR) into the Alabama SIP are being updated to reflect EPA-approved revisions to Alabama's SIP that have occurred since the last update. In this action EPA is also notifying the public of the correction of certain typographical errors.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/03/18/E9-5732/approval-and-promulgation-of-air-quality-implementation-plans-alabama-update-to-materials)
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