Site Feedback

Title 49

Displaying title 49, up to date as of 8/13/2026. Title 49 was last amended 8/07/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 49TransportationPart / Section
Subtitle BOther Regulations Relating to Transportation100 – 1699
Chapter IIIFederal Motor Carrier Safety Administration, Department of Transportation300 – 399
Subchapter BFederal Motor Carrier Safety Regulations350 – 399
Part 393Parts and Accessories Necessary for Safe Operation393.1 – 393.209
Subpart AGeneral393.1 – 393.7
§ 393.1Scope of the rules in this part.
§ 393.3Additional equipment and accessories.
§ 393.5Definitions.
§ 393.7Matter incorporated by reference.
Subpart BLamps, Reflective Devices, and Electrical Wiring393.9 – 393.33
Subpart CBrakes393.40 – 393.55
Subpart DGlazing and Window Construction393.60 – 393.63
§ 393.60Glazing in specified openings.
§ 393.61Truck and truck tractor window construction.
§ 393.62Emergency exits for buses.
§ 393.63 [Reserved]
Subpart EFuel Systems393.65 – 393.69
§ 393.65All fuel systems.
§ 393.67Liquid fuel tanks.
§ 393.68Compressed natural gas fuel containers.
§ 393.69Liquefied petroleum gas systems.
Subpart FCoupling Devices and Towing Methods393.70 – 393.71
§ 393.70Coupling devices and towing methods, except for driveaway-towaway operations.
§ 393.71Coupling devices and towing methods, driveaway-towaway operations.
Subpart GMiscellaneous Parts and Accessories393.75 – 393.94
Subpart HEmergency Equipment393.95
§ 393.95Emergency equipment on all power units.
Subpart IProtection Against Shifting and Falling Cargo393.100 – 393.136
Subpart JFrames, Cab and Body Components, Wheels, Steering, and Suspension Systems393.201 – 393.209