Section 929(e) in Police Regulations, Bengal , 1943
(e)Khaki jacket and trousers (slacks) may be worn on inspection duty, on duty in towns, when attending Court to give evidence or to prosecute case, at conferences and committee meetings and by Railway Police Officers when escorting the Viceroy or Governor by train. They shall, however, wear review order at stations where the arrival or departure is public.
