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EPA/AR RIN: 2060-AK76 Publication ID: Spring 2006 
Title: Emissions Durability Procedures for New Light-Duty Vehicles & Light-Duty Trucks 
Abstract: On October 22, 2002 the United States Court of Appeals for the District of Columbia Circuit vacated durability provisions that automotive manufacturers used to demonstrate that the emissions of their vehicles would comply with emission standards for the useful lives of those vehicles. The Court also required EPA to issue new regulations. This action fulfills the mandate. The new durability regulations will include options that a manufacturer may choose from to age pre-production vehicles to determine the rate of emission deterioration over the vehicle's useful life. The options will include a prescribed fixed driving cycle and a prescribed bench aging cycle that are used to age prototype vehicles or emission control components to the equivalent of the useful life period of the vehicle in a manner that replicates the aging that the vehicle or components would see in actual use. This rule does not change the federal emission standards or the test procedures used to quantify emissions. Although there is no court-ordered deadline, this is a court-ordered action. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR Part 86     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 USC 7521   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  04/02/2004  69 FR 17532   
Direct Final/NPRM  01/17/2006  71 FR 2810   
Additional Information: SAN No. 4757;
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
Sectors Affected: 3361 Motor Vehicle Manufacturing 
Agency Contact:
Linda Hormes
Environmental Protection Agency
Air and Radiation
Ann Arbor, MI 48105
Phone:734 214-4502
Fax:734 214-4053
Email: hormes.linda@epamail.epa.gov