Section 806(h) in Police Regulations, Bengal , 1943
(h)The examination will be held in January and July each year at the headquarters of each Range, on a date to be fixed by the Principal, Police Training College. The officers of the Criminal Investigation Department and its branches will be examined at the Range headquarters. The Principal shall report to the Inspector-General by the first week of November May each year the date fixed by him for approval and publication in the Police Gazette.
