Fuel Economy - Retrofit Devices.

Fuels and Fuel Additives (Extracts).

Vehicle and Engine Parameters and Specifications.

Exemption of Clean Alternative Fuel Conversions from Tampering Prohibition.

Urban Bus Rebuild Requirements.

Importation of Motor Vehicles and Engines.

Exclusions and Exemptions.

Recall Regulations.

Emission Defect Reporting.

Emission Control System - Performance Warranty and Voluntary Aftermarket Part Certification Program.