Axles. The front axle and suspension shall be of sufficient capacity to support that portion of the load as would be imposed by the manufacturer's maximum gross vehicle weight rating. The rear suspension assembly shall have a gross weight rating equal to that portion of the load as would be imposed by the manufacturer's maximum gross vehicle weight rating. Drive Shaft. Each segment of the drive shaft shall be equipped with a suitable guard to prevent accident or injury in the event of its fracture or disconnection.