In American Trucking Assn.v EPA the appeals court held that the California air
regulations that applied to trucks operating in California could be stronger than the
EPA rules that applied to trucks operating elsewhere.

Question

Quizplus · Accepted Answer

The appeals court's decision in American Trucking Assn.v EPA upheld the validity of California's more stringent air regulations for trucks operating within the state, even if those regulations differed from the EPA rules for trucks operating elsewhere in the country.