49 CFR Part 531

6 sections.

§ 531.1
§ 531.1 Scope.
§ 531.2
§ 531.2 Purpose.
§ 531.3
§ 531.3 Applicability.
§ 531.4
§ 531.4 Definitions.
§ 531.5
§ 531.5 Fuel economy standards.
§ 531.6
§ 531.6 Measurement and calculation procedures.

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.