Criteria, Procedures, and Conditions for Approving Vehicles Regarding Fuel Tanks Under Land Transport Law.

Emissions - Heavy Duty Vehicles.

Type Approval.

Emissions - Light Passenger and Commercial Vehicles.

Type Approval of Motor Vehicles and General Safety.

Bus Emergency Exits and Window Retention and Release.

Compressed Natural Gas Fuel Container Integrity.

Electric-powered Vehicles: Electric Powertrain Integrity Global Technical Regulation No. 20; Incorporation by Reference.

Agency Information Collection Activities; Notice and Request for Comment; 49 CFR 583 - Automobile Parts Content Labeling.

Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-duty Highway Engines and Amendments to Inducement Provisions for SCR-equipped Diesel Engines.