Section 310(3) in The West Bengal Motor Vehicles Rules, 1989
(3)If the trailer or trailers is/are being drawn by a locomotive, notwithstanding that the brakes of the trailer or trailers can be operated by the driver or some other person on the locomotive, there shall be not less than one person on each trailer and not less than two persons on the last trailer in train, one of whom shall be the person required by the provision of clause (c) of sub-section (1).
