Northern Territory Consolidated Acts37. Duration of registration
(1) A firearm ceases to be registered:
(a) if the person in whose name it is registered dies or, in the case of a firearm registered in the name of a corporation, the corporation is dissolved;
(b) if it is sold or otherwise disposed of;
(c) if it is lost or stolen; or
(d) if it is altered in a way:
(i) that affects its safety or fitness for use; or
(ii) that it becomes a firearm of a different category from the category specified in the certificate of registration relating to it.
(2) Where a person was, immediately before his or her death, the holder of a certificate of registration for a firearm, the personal representative of the person is, for 28 days or any longer period that the Commissioner in writing allows, deemed to be the holder of the certificate of registration for the purpose of disposing of the firearm in accordance with this Act.
(3) A certificate of registration expires 3 months after the holder ceases to reside permanently in the Territory.
Part 6. Surrender or revocation of licences, permits and certificates of registration