Commonwealth Consolidated Regulations(1) The Court, at any stage of a proceeding, may give leave to a person (the intervener ) to intervene in the proceeding, on the terms and conditions, and with the rights, privileges and liabilities (including liabilities for costs), determined by the Court.
(2) In deciding whether to give leave, the Court must have regard to:
(a) whether the intervener's contribution will be useful and different from the contribution of the parties to the proceeding; and
(b) whether the intervention might unreasonably interfere with the ability of the parties to conduct the proceeding as they wish; and
(c) any other matter that the Court considers relevant.
(3) The role of the intervener is solely to assist the Court in its task of resolving the issues raised by the parties.
(4) For subrule (3), assisting the Court includes suggesting witnesses to be called by the Court, but does not include filing pleadings, leading evidence or examining witnesses.
(5) When giving leave, the Court must specify the form of assistance to be given by the intervener and the manner of participation of the intervener, and, in particular, must specify:
(a) the matters that the intervener may raise; and
(b) whether the intervener's submissions are to be oral, in writing, or both.