For the purposes of the discharge of its functions the Commission has power —
(a) to request any information, documents or things, with respect to a complaint, from —
(i) any person making a complaint,
(ii) the person against whom the complaint is made, or
(iii) any other person who, in the opinion of the Commission, may be able to assist;
(b) in the case of a review of a complaint to —
(i) request all or any of the parties concerned as well as witnesses to appear before the Commission, or
(ii) request such information, documents or things as it deems necessary to review the complaint; and
(c) subject to this Act, regulate its own procedure.