U.S. Court of Appeals for the D.C. Circuit

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Case Updates

D.C. Circuit considers regulation of tailpipe emissions

June 26, 2012

The U.S. Court of Appeals for the D.C. Circuit ruled that the EPA validly promulgated the Tailpipe Rule.

U.S. Chamber challenges regulation of tailpipe emissions

July 06, 2010

NCLC is challenging a rule that would subject passenger cars, light-duty trucks, and medium-duty passenger vehicles to greenhouse gas regulations (the “Tailpipe Rule”). On April 1, 2010, EPA and the Transportation Department finalized a joint rulemaking boosting automobile and light-truck efficiency standards for model years 2012 to 2016. These first-ever federal mobile source standards for greenhouse gases (GHG) trigger EPA's ability to regulate GHG for stationary sources. NCLC's challenge to the Tailpipe Rule focuses primarily on the impact of this rule on stationary sources, and does not challenge the substance of the emissions agreement the auto industry negotiated with the Administration. NCLC is challenging the regulations as part of its multifaceted strategy to make clear that the Clean Air Act is not the appropriate vehicle for greenhouse gas regulation.

Petition for review filed 7/6/10. Consolidation motion filed 8/26/10. Motion for stay of Endangerment-related rules filed 10/29/10. Endangerment-related cases designated complex and coordination ordered 11/16/10. Motion for stay of Endangerment-related rules denied 12/10/10. Proposed briefing schedule filed 1/11/11. Scheduling order issued 3/22/11. Opening brief filed 6/3/11. Decided 6/26/12.

Case Documents