Section 1116(d) in Police Regulations, Bengal , 1943
(d)The first special report shall be submitted upon receipt of the information at headquarters and the second as soon as the full circumstances of the case have been ascertained. Subsequent reports shall be submitted every fortnight until the investigation is closed, except in unimportant cases when the officers to whom the reports are sent have indicated that only a final report is needed. After the investigation is closed, reports shall be submitted on the completion of each stage, such as committal or conviction.
