Section 739(2)(g) in Police Regulations, Bengal , 1943
(g)Confirmation or discharge. - (i) The Superintendent may confirm probationary Sergeants on the termination of the period of their probation.(ii)When a probationer is about to complete the period of probation, the Superintendent shall record an order either confirming him in his appointment with effect from the date of completion of the period of probation or extending that period or discharging him from the service.