Sec. 4. (a) Except as provided in subsections (b) through (c), a new motor vehicle, trailer, or semitrailer sold in Indiana and operated upon the highways must be equipped with service brakes upon all wheels of the vehicle.
(b) A semitrailer or trailer of less than three thousand (3,000) pounds gross weight is not required to be equipped with brakes.
(c) A truck or truck-tractor having at least three (3) axles is not required to have service brakes on the front wheels. If a truck or truck-tractor is equipped with at least two (2) steerable axles, the wheels of one (1) steerable axle are not required to have service brakes although the truck or truck-tractor must be capable of complying with the performance requirements of sections 7 through 8 of this chapter.