The Registrar may delegate all or any of his or her powers and functions to:
(a) a defence member who holds a rank not lower than lieutenant commander, major or squadron leader; or
(b) a person whose classification level appears in Group 5 or a higher Group of Schedule 1 to the Classification Rules under the Public Service Act 1999 ; or
(c) a person who is acting in a position usually occupied by a person with a classification level of the kind mentioned in paragraph (b).