The test for joinder of a third party to a planning appeal is not limited to 'exceptional or extraordinary circumstances'; the relevant factors include the nature and strength of the applicant's interest, the contribution the applicant can make to proper resolution of the issues, whether the applicant's interest will be adequately dealt with by existing parties, and the impact of joinder on the proceedings. Where the abolition of a tribunal and transfer of jurisdiction to SAT leaves pending applications undetermined, s 37 of the Interpretation Act 1984 (WA) preserves accrued rights and SAT must apply the law in force before the transfer day. The meaning of 'proceedings' in s 67 of the Planning Act was left unresolved, with the majority holding it refers to the appeal (not a step in it) and the minority holding it encompasses interlocutory applications.
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