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Final Rule

Air Plan Approval; AK; Updates to Materials Incorporated by Reference

In Plain English

What is this Federal Register notice?

This is a final rule published in the Federal Register by Environmental Protection Agency. Final rules have completed the public comment process and establish legally binding requirements.

Is this rule final?

Yes. This rule has been finalized. It has completed the notice-and-comment process required under the Administrative Procedure Act.

Who does this apply to?

Consult the full text of this document for specific applicability provisions. The affected parties depend on the regulatory scope defined within.

When does it take effect?

This document has been effective since February 9, 2026.

Why it matters: This final rule amends regulations in 40 CFR Part 52.

Document Details

Document Number2026-02478
TypeFinal Rule
PublishedFeb 9, 2026
Effective DateFeb 9, 2026
RIN-
Docket IDEPA-R10-OAR-2025-3357
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