According to the WA Police website (WAPOL)
http://www.austlii.edu.au/au/legis/wa/c ... /s11a.htmlFIREARMS REGULATIONS 1974 - REG 11A
11A . Storage security requirements (Sch. 4)
(1) A person entitled to possess firearms or ammunition of any kind is to ensure that the firearms or ammunition are stored in accordance with this regulation.
(2) Firearms and ammunition are to be stored in a locked cabinet or container that at least meets the specifications described in Schedule 4 or in such other way as is approved.
(3A) Subregulation (2) does not apply to propellant unless it is incorporated in a cartridge.
(3) A cabinet or container that can be unlocked with a key is to be regarded as unlocked if the key is left in the lock or is otherwise accessible where the cabinet or container is located.
[(4)‑(6) deleted]
(7) A magazine is not to contain any ammunition when it is stored.
(8) Ammunition is not to be stored in a cabinet or container in which a firearm is stored unless the ammunition is in another locked metal container in which no firearm is stored and which is securely affixed so as to prevent its removal from the cabinet or container.
[(9) deleted]
(10) The requirements of this regulation are in addition to, not instead of, any requirements under the Dangerous Goods Safety Act 2004 .
[Regulation 11A inserted in Gazette 6 Dec 1996 p. 6801; amended in Gazette 24 Sep 1997 p. 5367; 4 Feb 2011 p. 397; 21 Jul 2015 p. 2939.]
[ 11B. Omitted under the Reprints Act 1984 s. 7(4)(g).]