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Final ruleTook effect June 15, 2026

Air Plan Approval; Montana; Revisions to Western Sugar Stipulation

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register May 14, 2026. Document 2026-09619. Updated Nov. 11, 2026.

What it does

The Environmental Protection Agency (EPA) is approving revisions to the Montana State Implementation Plan (SIP). These revisions specifically address sulfur dioxide (SO<INF>2</INF>) emission limits and associated requirements related to the Western Sugar Cooperative facility in Billings, Montana. The EPA is taking this action pursuant to the Clean Air Act (CAA).

The Environmental Protection Agency's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 52

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Environmental Protection Agency has published 245 final rules in 2026 so far, compared with 263 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

What happens next and when

This rule is effective on June 15, 2026.

The agency's dates, word for word.

Document number2026-09619
ActionFinal rule.
AgenciesEnvironmental Protection Agency
PublishedMay 14, 2026
Effective dateJune 15, 2026
DocketEPA-R08-OAR-2025-2070

Source: the Federal Register (public domain). The document in the Federal Register