Section 30 of the AAT Act applies in relation to a reviewable objection decision or an extension of time refusal decision as if subsection (1A) of that section were omitted and the following subsection were substituted:
"(1A) If an application has been made by a person to the Tribunal for the review of a reviewable objection decision or an extension of time refusal decision:
(a) any other person whose interests are affected by the decision may apply, in writing, to the Tribunal to be made a party to the proceeding; and
(b) the Tribunal may, in its discretion, by order, if it is satisfied that the person making the application consents to the order, make that person a party to the proceeding.".