(1) In any action, prosecution or other proceeding under, or arising out of, this Act, the Registrar may appear personally or may be represented by:
(a) a person enrolled as a barrister, solicitor, barrister and solicitor or legal practitioner of a federal court or of the Supreme Court of a State or Territory; or
(b) a person authorised by the Registrar, in writing, to appear.
(2) The appearance of a person, and the statement of the person that the person appears with the authority of the Registrar, is prima facie evidence of that authority.