Imagine you’re an automaker. The federal government says your gas-powered vehicles are fine. But California steps in—with EPA approval—and tells you they’re not. Who gets to challenge that? Only the fuel suppliers footing the bill? Or the manufacturers whose fleets are directly targeted?
According to the U.S. Supreme Court: both.
That’s more or less what happened in Diamond Alternative Energy LLC v. EPA, a case about electric vehicle mandates masquerading as a fight about standing. On June 20, the Court ruled that fuel companies have standing to challenge a 2022 EPA decision allowing California to enforce tougher emissions standards than the federal government. The decision didn’t settle who’s right on the merits—but it cleared the way for a fight that could reshape national climate policy and the auto industry’s future, at least during the Trump administration.
And it all hinges on California’s decades-old hall pass from the Clean Air Act.
Continue reading “Who Gets to Set the Rules? California, EV Mandates, and the Fight Over Clean Air Authority”