Section 854(a) in Police Regulations, Bengal , 1943
(a)(i)All applicants for pensions or gratuity with the exception of those mentioned in clause (c), shall, at the time of preparation of their applications for pension, make before the head of the office, in the first page of their application for pension, in the space provided therein for the purpose, impressions of the balls of the thumb and all the fingers of the left hand. If in any case attendance before the head of the office be a matter of difficulty, or occasion undue expense to the applicant, he may, with the consent of the head of the office, give the impressions before a Magistrate, who shall satisfy himself as to the identity of the applicant and record a certificate stating that he has done so and that the impressions have been taken in his presence.(ii)Impressions similar to those mentioned in clause (i) above shall, at the same time, be taken in duplicate in B. P. Form No. 161 and shall be attached to the application for pension or gratuity.