(1) The Commissioner shall, for the purpose of carrying out his or her functions do all such acts as appear to him or her to be requisite, advantageous or convenient for, or in connection with the carrying out of his or her functions under this Act.
(2) The Commissioner may, in relation to carrying out of the investigation of any complaint under this Act —
(a) summon and enforce the appearance of persons before the Commissioner and require the person to give oral or written evidence on oath and to produce such documents and things as the Commissioner considers requisite to the full investigation and consideration of the complaint, in the same manner and to the same extent as a Judge of the High Court;
(b) administer oaths;
(c) receive and accept such evidence and other information, whether on oath or by affidavit or otherwise, as the Commissioner sees fit, whether or not the evidence or information is or would be admissible in a Court of law;
(d) enter any premises occupied by any public authority on satisfying any security requirements of the authority relating to the premises;
(e) converse in private with any person in any premises entered under paragraph (d) and otherwise carry out such inquiries within the power of the Commissioner under this Act as the Commissioner sees fit; and
(f) examine or obtain copies of or extracts from books or other records found in any premises entered under paragraph (d) containing any matter relevant to the investigation.
(3) The Commissioner may, during the investigation of any complaint under this Act, examine any information recorded in any form held by a public authority and information that the Commissioner may examine under this subsection shall not be withheld from the Commissioner by any person and on any grounds.
(4) Any document or thing produced under this section by any person or public authority shall be returned by the Commissioner within ten days after a request is made to the Commissioner by that person or authority, but nothing in this subsection precludes the Commissioner from again requiring its production in accordance with this section.