The driveshaft shall be protected by at least one metal guard or bracket around the circumference of the driveshaft to prevent the driveshaft whipping through the floor or dropping to the ground if there is a failure of the driveshaft or any of its component parts.
67 Pa. Code § 171.19
The provisions of this §171.19 amended under the Vehicle Code, 75 Pa.C.S. §§ 4103, 4551-4553 and 6103.