Section 264(e) in Police Regulations, Bengal , 1943
(e)Each form shall have a separate printed number running consecutively throughout the book so that no two forms shall bear the same number. On the conclusion of an investigation the sheets of the original diary shall be removed from the book and filed together. Every file shall be docketed with the number, month and year of the First Information Report, the final form submitted, and the name of the complainant, the accused, and the investigating officer. The orders regarding preservation and destruction of these papers shall also be noted.