This bill would amend the Clean Air Act to require states obtain approval from four federal agencies—the Secretaries of Agriculture, Energy, Interior, and Transportation—before adopting or enforcing certain vehicle emissions standards. Currently, states like California can set their own vehicle emissions rules stricter than federal standards, but this bill would require those states to gain concurrence from multiple Cabinet departments before proceeding. The legislation applies to any new waiver or authorization requests submitted after the bill becomes law. The bill does not specify funding amounts or detailed timelines beyond this effective date. The measure would primarily affect states that adopt California's vehicle emissions standards and their ability to set independent air quality rules.