40 CFR § 60.28a - Plan revisions by the State.

---
identifier: "/us/cfr/t40/s60.28a"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.28a - Plan revisions by the State."
title_number: 40
title_name: "Protection of Environment"
section_number: "60.28a"
section_name: "Plan revisions by the State."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---


# 60.28a Plan revisions by the State.

(a) Any significant revision to a State plan shall be adopted by such State after reasonable notice, public hearing, and meaningful engagement. For plan revisions required in response to a revised emission guideline, such plan revisions shall be submitted to the Administrator within fifteen months, or as determined by the Administrator, after publication in the *Federal Register* of a final revised emission guideline under § 60.22a. All plan revisions must be submitted in accordance with the procedures and requirements applicable to development and submission of the original plan.

(b) A revision of a plan, or any portion thereof, shall not be considered part of an applicable plan until approved by the Administrator in accordance with this subpart.

[84 FR 32575, July 8, 2019, as amended at 88 FR 80545, Nov. 17, 2023]