Fuels Groups, GOP States Detail Claims Against MY27-32 Auto Standards

The liquid fuels sector and Republican-led states are detailing their legal arguments against EPA’s multi-pollutant standards for model year 2027-32 vehicles, claiming the regulation violates the Supreme Court’s “major questions” doctrine and improperly includes electric vehicles (EVs) in the rule’s fleet averaging compliance mechanism. In addition, critics are spotlighting what they view as EPA’s flawed cost-benefit analysis for the rule, asserting the agency’s social cost of carbon (SCC) metric used to monetize climate-related benefits is arbitrarily weighted to support strict...