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U.S. Federal Regulations

U.S. Federal regulations specify the adequacy and application of brake related systems and parts. It is common for more than one section to address they same or similar topic. Always check current code for latest revisions, exceptions and/or additional regulations.



What Is "121" Breakaway & Emergency Brakes (393.43) Required Brake Systems (393.40)
Complete 121
(571.121)
Brakes Required On All Wheels (393.42) Brake Tube & Hose, Adequacy (393.45)
Air Suspensions
(393.207 Section F)
Parking Brakes
(393.41)
Anti-Lock Brakes
(393.55)