(1) In an authorising law, a reference to a person whose interests are affected by a decision (however described) includes a reference to an unincorporated body, the Territory, the Commonwealth, a territory authority or Commonwealth authority.
(2) A body has interests that are affected by a decision if the decision relates to a matter included in the objects or purposes of the body.
(3) Subsection (2) does not apply in relation to a decision given before the body was formed or before the objects or purposes of the body included the matter.
(4) The tribunal may decide whether or not a person's interests are affected by a decision, and the tribunal's decision is conclusive.
(5) In this section:
"Commonwealth authority" means a body established under a Commonwealth law.