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EPA/OAR RIN: 2060-AU88 Publication ID: Spring 2020 
Title: ●Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements Update Rule 

This proposed rulemaking will update the final State Implementation Plan (SIP) Requirements Rule for the 2008 Ozone National Ambient Air Quality Standards (NAAQS) (80 FR 12264, March 6, 2015) to reconcile regulatory provisions that were vacated as part of the decision in South Coast Air Quality Management District v. EPA , 882 F.3d 1138(D.C. Cir. 2018) ( South Coast II ) with those listed in Part 51 of the Code of Federal Regulations (CFR).  The 2008 SIP Requirements Rule governs attainment planning requirements that apply to areas designated nonattainment for the 2008 ozone NAAQS, and states in the Ozone Transport Region, as well as anti-backsliding requirements for areas once designated nonattainment for the revoked ozone NAAQS. This proposed action will clarify national policy by updating affected provisions in the 2008 ozone SIP Requirements Rule to reflect the outcome of South Coast II and ensure that states understand the requirements that apply to them for continued implementation of the ozone NAAQS.

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 52   
Legal Authority: 42 U.S.C. 7401 et seq., Clean Air Act   
Legal Deadline:  None
Action Date FR Cite
NPRM  10/00/2020 
Final Action  06/00/2021 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, State 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Emily Millar
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-2619
Fax:919 541-5509

Robert Lingard
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-01,
Research Triangle Park, NC 27709
Phone:919 541-5272