3. ¹[(1) The Director-General may- (a) make plan and supervise the taking of census throughout Bangladesh;(b) appoint census officers to take, aid in or supervise the taking of, the census within any specified area.] (2) [Omitted by section 5 of the Agricultural Census (Amendment) Ordinance, 1983 (Ordinance No. XXII of 1983).] (3) A declaration in writing, signed by any authority authorised by the ²[Director-General] in this behalf, that a person has been duly appointed a census officer shall be conclusive proof of such appointment.