The Arms Act, 1959
42. Power to take census of fire-arms –
(1) The Central Government may, by notification in the Official Gazette, direct a census to be taken of all firearms in any area and empower any officer of Government to take such census.
(2) On the issue of any such notification all persons having in their possession any firearms in that area shall furnish to the officer concerned such information as he may require in relation thereto and shall produce before him such firearms if he so requires.