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EPA/OAR RIN: 2060-AV48 Publication ID: Spring 2023 
Title: Adoption and Submittal of State Plans for Designated Facilities: Implementing Regulations Under Clean Air Act Section 111(d) 

The Clean Air Act (CAA) section 111(d) directs the EPA to promulgate a procedure “similar” to that provided by CAA section 110, under which states submit 111(d) plans for regulatory implementation to the EPA. In 1975, EPA addressed this requirement by promulgating “implementing regulations” under 40 CFR part 60, subpart B. These implementing regulations contain, among other things, deadlines for the submission of, and for EPA’s action on, “state plans”, as well as deadlines for the promulgation of related “federal plans.” In 2019 the EPA finalized 40 CFR part 60, subpart Ba, a new subpart that updated the implementing regulations for prospective emission guidelines. However, the United States Court of Appeals for the District of Columbia Circuit (in American Lung Ass’n v. EPA, No. 19-1140) vacated the Subpart Ba state and federal plan timelines due to a finding of inadequate justification. Amendments to the timelines in subpart Ba, consistent with the court vacatur, and additional updates and tools to aid in implementation of emission guidelines were proposed in the Federal Register on Dec. 23, 2022 (87 FR 79176). The public comment period closed on Feb. 27, 2023. This action will respond to comments and finalize amendments. The docket number for this rulemaking is EPA-HQ-OAR-2021-0527.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 60, subpart Ba     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 U.S.C. 7411 Clean Air Act    42 U.S.C. 7414, 7601   
Legal Deadline:  None
Action Date FR Cite
NPRM  12/23/2022  87 FR 79176   
NPRM Comment Period End  01/24/2023 
Final Rule  09/00/2023 
Additional Information: .
Regulatory Flexibility Analysis Required: No  Government Levels Affected: State 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Michelle Bergin
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-2726

Elineth Torres
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code D205-02,
Research Triangle Park, NC 27709
Phone:919 541-4347