Section 208(b) in Police Regulations, Bengal , 1943
(b)Constables may occasionally be employed on clerical duties of an unimportant nature. They shall not be permanently employed on such duties and constables if required for this purpose shall be taken in turn from the roster, performing also patrol and other outdoor duty in proper rotation. A particular constable may be detailed to perform the clerical duties of an Assistant Sub-Inspector when the latter is sick or absent outside the police-station jurisdiction.