Section 356(b) in Police Regulations, Bengal , 1943
(b)The town area shall be divided into beats and at certain important localities fixed posts shall also be established so that the public as well as the beat constables may know where to apply for aid in case of necessity. Ordinarily one-tenth of the force of each outpost shall be reserved for vacancies, sickness, etc. Two-thirds of the remainder shall be detailed for night duty, the remaining one-third being utilised for day duty. Duty shall be so arranged that every head constable and constable shall have one night out of every three off duty. The desirability of having a certain proportion of the town staff working in plain clothes shall be borne in mind as well as the necessity for concentrating rather on the bye-lanes and the backs of houses than on main thoroughfares. Uniformed constables when proceeding from the outpost on duty shall invariably be inspected and marched off by a head constable.
