The D.C. Circuit upheld EPA's decision to reconsider greenhouse gas emission standards for model year 2022-2025 vehicles. States and environmental groups argued that EPA violated procedural…

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…

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…

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 holds that an automobile manufacturers association is entitled to attorney fees in connection with an underlying action in which New York's zero emission vehicle sales requirement…

The court holds that New York's zero emission vehicle (ZEV) sales requirement for model years 1998-2002 is preempted by Clean Air Act (CAA) §209. The court first holds that the ZEV sales…

The court upholds the U.S. Environmental Protection Agency's (EPA's) decision to grant California a Clean Air Act (CAA) §209(b) waiver allowing the state to enforce its own on-board…

A district court holds that the Clean Air Act (CAA) does not preempt New York's zero emission vehicle (ZEV) sales mandate and dismisses an action brought by automobile manufacturers seeking…