(2)A train shall not be moved by mechanical or electrical power unless it is proceeded at a distance of not less than 30 yards during the whole of its journey by the shunting jamadar. He shall be provided with the signalling flags or lamp necessary for its control by day or by night, and with a whistle for calling the attention of the driver:Provided that the Chief Inspector may by an order in writing exempt a specified factory or specified part of it, or all or any of the trains traversing it, from the operation of all or any of the provisions of this rule on such terms and conditions as he considers necessary for safety.
