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EPA/AR RIN: 2060-AR48 Publication ID: 2012 
Title: ●Heavy-Duty On-Highway and Non-Road Engine and Vehicle Regulation Streamlining and Technical Amendments 
Abstract: This rule will include technical amendments to NHTSA's and EPA's heavy-duty engine and vehicle fuel economy and GHG regulations and technical amendments to EPA's nonroad compression ignition engine "Tier 4" criteria emissions regulations. The heavy-duty fuel economy and GHG amendments are typographical fixes, clarifications, and revisions to ensure the regulations reflect the contents of the final rule's preamble. EPA will follow up further by emailing a summary table of the amendments to the EPA portions of the heavy-duty GHG regulations. The nonroad amendments affect two areas of the Tier 4 program: replacement engines and technical hardship flexibilities. The replacement engine amendments allow for the continuation of replacement engine programs such as federal and state grant programs to replace very old and highly polluting nonroad engines. The amendment would allow replacing old dirty engines with clean efficient non-Tier 4 engines, only if Tier 4 replacement engines are impractical. The technical hardship flexibility amendment allows EPA to grant a limited amount of additional technical hardship flexibility to nonroad equipment manufacturers, only if they continue to meet the existing technical hardship criteria set forth in 40 CFR 1039.625(m). This amendment is needed only because some engine manufacturers have still not been able to provide prototype engines to some nonroad equipment manufacturers on schedule to meet EPA's nonroad Tier 4 final NOx and PM standards. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 1036    40 CFR 1037    40 CFR 86    40 CFR 1066    40 CFR 1068   
Legal Authority: Clean Air Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  04/00/2013 
Direct Final Rule  04/00/2013 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Federal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL: http://www.epa.gov/otaq/  
RIN Data Printed in the FR: No 
Agency Contact:
Matt Spears
Environmental Protection Agency
Air and Radiation
Mail Code: ASD1,
Ann Arbor, MI 48105
Phone:734 214-4921
Fax:734 214-4816
Email: spears.mattew@epa.gov

Angela Cullen
Environmental Protection Agency
Air and Radiation
AAHDOC,
Ann Arbor, MI 48105
Phone:734 214-4419
Email: Cullen.Angela@epamail.epa.gov