Brakes Required

A motor vehicle, trailer, semitrailer, pole trailer, or combination of those vehicles shall be equipped with brakes.

A trailer, semitrailer, or pole trailer is not required to have brakes if:

1. its gross weight is 4,500 pounds or less; or
2. its gross weight is heavier than 4,500 pounds but not heavier than 15,000 pounds, and it is drawn at a speed of not more than 30 miles per hour.

Each power unit must be equipped with a parking brake

A motor vehicle used to tow a trailer, semitrailer, or pole trailer equipped with brakes shall be equipped with service brakes arranged so that, in case of a breakaway of the towed vehicle, the towing vehicle is capable of stopping by use of its service brakes