.09 Rear Wheel Protector Flaps.

A person may not operate, cause or permit to be operated any bus or truck on the highways of this State unless it is equipped with suitable metal protectors or substantial flexible flaps behind the rearmost wheels of the vehicle to prevent the projection of rocks, dirt, water, or other substances to the rear and to minimize side spray. This regulation does not apply to any farm tractor or any vehicle registered as a farm truck or to uncoupled truck tractors or other vehicles where the construction is such that complete freedom around the wheel area is necessary to secure the designed use of the vehicle.

Procedures Reject Vehicle If:
A. The protectors or flaps shall have a ground clearance of not more than one-third of the horizontal distance from the bottom edge of the protector or flap to the centerline of the axle, provided, however, that no protector or flap need be closer to the ground than 6 inches under any condition of loading. The protector or flap shall extend laterally at least the width of the tire or tires being protected. A. Measurement A is longer than 1/3 the length of Measurement B and the vehicle is not equipped with flaps (see Figures 20 and 21).
B. Protector or flap does not extend laterally at least the width of tire or tires.
C. Protectors or flaps not securely attached to the vehicle.
B. If any truck or bus is so designed or constructed that the objectives of this regulation are accomplished by reason of fender or body construction or other means of enclosure, either permanent or temporary, then the requirements of this regulation have been satisfied.