Section 584(b) in Police Regulations, Bengal , 1943
(b)When the District Police has under observation a wandering or other gang which may use the railway for eluding vigilance, the officer-in-charge shall inform the officer-in-charge of the nearest railway police-station and the latter will depute Railway constables to know the chief members of the gang, the places of these constables being filled temporarily by constables from the district police-station, if necessary.
