Chevron Ruling Divides Supporters, Critics of Car Emissions Rule

The EPA, its supporters, and its critics weighed in on whether the end of the Chevron doctrine affects litigation over the agency’s vehicle emission rules, according to supplemental briefs filed on Monday.

The US Court of Appeals for the District of Columbia Circuit in July gave parties 21 days to submit briefs explaining their takes on whether the fall of Chevron has any bearing on statutory interpretation in this case—which grapples with the legality of the Environmental Protection Agency’s latest vehicle emission standards.

The decades-old doctrine in question once gave deference to agency statute interpretation in legal disputes, but was ...