Section 921(a) in Police Regulations, Bengal , 1943
(a)Every step in the official life of a servant of the Crown must be recorded in his service book or roll and every period of suspension from employment and every other interruption of service must be noted, with full details of its duration, in an entry made across the page of the service book or roll and must be attested by the attesting officer. It is the duty of the attesting officer to see that such entries are promptly made. If a servant of the Crown is reduced to a lower substantive post the reason of the reduction must be briefly shown. An officer's service book or roll should be consulted when any question of promotion, transfer or punishment arises.
