Commonwealth Numbered Regulations Commonwealth Numbered RegulationsEach of the following is a competent officer :
(a) an officer;
(b) a member of the naval, military or air force of Canada, New Zealand, the United Kingdom or the United States of America who holds a rank equivalent to an officer;
(c) in relation to a member of the Defence Force who is a prisoner of war, interned or in custody in a place outside Australia--the person who is the official representative of prisoners of war or other persons detained or interned in that place.