# Air Plan Approval; Arkansas; Codification of the State Implementation Plan
> **Rule** · Final rule. · Published 2026-01-26 · Effective 2026-02-25 · 91 FR 3037
## Document
- **Document number:** 2026-01410
- **Category:** air-emissions
- **Federal Register citation:** 91 FR 3037
- **CFR reference:** 40 CFR 52
- **Publication date:** 2026-01-26
- **Effective date:** 2026-02-25
- **State:** AR
- **EPA docket:** EPA-R06-OAR-2025-0015
## Abstract

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving revisions to the Arkansas State Implementation Plan (SIP) submitted by the Arkansas Department of Energy and Environment (ADEE) to the EPA on February 4, 2025. The revisions address the codification of the Arkansas Pollution Control and Ecology Commission (APC & EC) Rule 19 and Regulations 9, 26, and 31 into the Code of Arkansas Rules (CAR). The revisions are non-substantive formatting edits and do not relax or introduce new rules to the approved SIP.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/01/26/2026-01410/air-plan-approval-arkansas-codification-of-the-state-implementation-plan)
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