Section 708(l) in Police Regulations, Bengal , 1943
(l)When treasure sent by railway arrives at its destination at night it shall not, if it is in a special wagon, be unloaded till morning. But when the treasure is in a brake van or on a steamer, and unloading at night is unavoidable, the escort sent to the station should be rather larger than the minimum scale laid down for the escort of treasure by road. The part of the station or land where the treasure is being moved should be carefully lighted.