The U.S. Environmental Protection Agency (EPA) has issued a “final disapproval” ruling against a California regulation that calls for emission checks on all vehicles over 14,000 pounds, regardless of where they are registered. The state’s Heavy-Duty Inspection and Maintenance Program, or Clean Truck Check regulation, screens the emissions output of vehicles operating on the state’s roads. It is also a federal violation over foreign policy matters to regulate vehicles from other countries, such as Canada and Mexico, EPA said. Following the announcement, the California Air Resources Board said the EPA lacks the authority to regulate the state’s program. Gavin Newsom’s press office said in a social media post that “EPA isn’t stopping California from enforcing California law.”