(1) A person referred to in paragraph 33C(1)(a) who has a sufficient interest to commence a proceeding on his or her own behalf against another person has a sufficient interest to commence a representative proceeding against that other person on behalf of other persons referred to in that paragraph.
(2) Where a person has commenced a representative proceeding, the person retains a sufficient interest:
(a) to continue that proceeding; and
(b) to bring an appeal from a judgment in that proceeding;
even though the person ceases to have a claim against the respondent.