(1)Loose shunting shall be permitted only when it cannot be avoided. It shall never be performed on a vehicle not accompanied by a man capable of applying and pinning down the brakes. A vehicle not provided with brakes in good working order and capable of being easily pinned down shall not be loose-shunt unless attached to it atleast one other vehicle with such brakes. Loose-shunting shall not be performed with, or against a vehicle containing passengers, live-stock or explosives.