(1) The Commissioner may, for the purpose of performing his or her functions, investigate the activities of any public sector body and for that purpose the Commissioner, or a person authorised by the Commissioner in writing, has all the powers conferred on a special inquirer by this Act and the provisions of sections 12 and 13 and Schedule 3 apply to and in relation to ¾

(a) the Commissioner or that person as if he or she were a special inquirer; and

(b) that investigation as if it were a special inquiry.

(2) Section 14 applies to and in relation to a person authorised within the meaning of subsection (1) as if references in that section to a special inquirer, the Minister or the special inquiry concerned were references to that person, the Commissioner or the investigation concerned, respectively.