(a) a person aggrieved by the act; or
(b) an agent acting on behalf of one or more persons aggrieved by the act.
(2) A person shall not act as an agent unless the person is—
(a) authorised in writing to so act on behalf of the aggrieved person or persons concerned; or
(b) authorised by the Commissioner to act on behalf of an aggrieved person who is unable to make a complaint or authorise an agent to act.
(3) Two or more persons may make a complaint jointly.
(4) A complaint shall be in writing specifying—
(a) particulars of the complaint; and
(b) so far as practicable, the respondent or each respondent to the complaint.