Australian Capital Territory Numbered Regulations Australian Capital Territory Numbered Regulations(2) A person shall not have possession of a firearm, or a spare barrel of a different calibre from the firearm with which it is used, for which a number has been allotted under subregulation (1) unless that number is imprinted on the firearm or barrel.
Penalty:
(a) if the offender is a natural person—10 penalty units;
(b) if the offender is a body corporate—50 penalty units.
(3) In subregulation (2)—
(a) in the case of a firearm—means stamped or, if the Registrar approves, engraved in an exposed position on the firearm in numerals not less than 2 mm in height on the metal part of the barrel; or
(b) in the case of a spare barrel—stamped or imprinted on the outer surface of the barrel in numerals not less than 2 mm in height on the metal part of the barrel.