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EPA/OAR RIN: 2060-AU98 Publication ID: Fall 2020 
Title: ●Amendment of 40 CFR 63.6(f)(1) and 40 CFR 63.6(h)(1) to Reflect Court Vacatur of General Provisions for Emission Standard Exemptions During Periods of Startup, Shutdown, and Malfunction (SSM) 
Abstract: The United States Court of Appeals for the District of Columbia Circuit vacated two provisions in the Clean Air Act (CAA) section 112, effecting compliance requirements with National Emission Standards for Hazardous Air Pollutants (NESHAP) during periods of startup, shutdown and malfunction (SSM). Specifically, the 2008 Court decision in Sierra Club v. EPA, 551 F.3d 1019 (D.C. Cir. 2008) vacated the SSM emission standard exemptions contained in 40 CFR 63.6(f)(1) and 40 CFR 63.6(h)(1) of the General Provisions. The Court holds that under section 302(k) of the CAA, emission standards or limitations must be continuous in nature and that the SSM exemption violates this CAA requirement. On October 16, 2009, the Court mandated the vacatur, making it immediately effective. This EPA action implements the mandate by amending the provisions at 40 CFR 63.6(f)(1) and 40 CFR 63.6(h)(1). 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Not subject to, not significant 
CFR Citation: 40 CFR 63   
Legal Authority: 42 U.S.C. 7412 Clean Air Act   
Legal Deadline:
Action Source Description Date
None       
Timetable:
Action Date FR Cite
NPRM  01/00/2021 
Direct Final Rule  01/00/2021 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  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
D205-02,
Research Triangle Park, NC 27711
Phone:919 541-2726
Email: bergin.michelle@epa.gov

Lisa Conner
Environmental Protection Agency
Office of Air and Radiation
D205-02,
Research Triangle Park, NC 27711
Phone:919 541-5060
Email: conner.lisa@epa.gov