Section 189(1) in The West Bengal Motor Vehicles Rules, 1989
(1)Any police officer in uniform not below the rank of a Sergeant or a Sub-inspector or any Motor Vehicles inspector may, at any time, when the vehicle is in a public place, call upon the driver of a goods vehicle to stop the vehicle and to keep it at rest for such time as may be necessary to enable the police officer or the Motor Vehicles inspector, as the case may be, to make reasonable examination of the contents of the vehicle.
