The D.C. Circuit dismissed as moot truck engine manufacturers' lawsuit challenging four certificates of conformity EPA issued to another engine manufacturer pursuant to an interim final rule…

The D.C. Circuit dismissed a road building association's lawsuit challenging EPA regulations for nonroad engines and vehicles. The regulations pertain to CAA §209(e), which preempts certain…

The D.C. Circuit vacated an interim final rule issued by EPA that would allow manufacturers of heavy-duty diesel engines to pay nonconformance penalties in exchange for the right to sell engines…

A district court dismissed an automobile engine manufacturer's lawsuit against EPA seeking to force the Agency to recall model year 2010 heavy-duty diesel engines equipped with liquid, urea…

A district court held that EPA need not issue endangerment findings under the CAA for marine vessels and nonroad vehicles and engines, but it denied the Agency's motion to dismiss…

The D.C. Circuit denied a petition for review challenging EPA's decision granting California a waiver from federal preemption under the CAA that allows the state to implement its own…

A district court denied two aviation associations' motions to intervene in a case asking the court to order EPA to use its authority under the CAA to regulate greenhouse gas emissions from…

The Court held that the U.S. Environmental Protection Agency (EPA) has the statutory authority to regulate greenhouse gases (GHGs) from new motor vehicles. The case arose after private…

The court denies an engine manufacturer's petition to review the U.S. Environmental Protection Agency's (EPA's) Clean Air Act (CAA) Phase 2 emissions standards for new nonroad spark…

The court grants automakers' motion to stay their challenge to Massachusetts' zero emission vehicle standards pending the automakers' appeal of a U.S. Environmental Protection…