(ii) Did the Commission have power to determine the jurisdictional application?
10 As to the first of these questions, Tristar submitted that there was no requirement for notices to be issued under s 78B of the Judiciary Act. No other party contended otherwise.
11 We accept Tristar's submission in this respect. Section 78B of the Judiciary Act provides:
Where a cause pending in a federal court including the High Court or in a court of a State or Territory involves a matter arising under the Constitution or involving its interpretation, it is the duty of the court not to proceed in the cause unless and until the court is satisfied that notice of the cause, specifying the nature of the matter has been given to the Attorneys-General of the Commonwealth and of the States, and a reasonable time has elapsed since the giving of the notice for consideration by the Attorneys-General, of the question of intervention in the proceedings or removal of the cause to the High Court.
12 It is apparent that s 78B only has application with respect to a "federal court" or a "court of a State or Territory". The Commission as currently constituted is not a court, and accordingly no notice is required under s 78B: Unions NSW v Carter Holt Harvey Wood Products Australia Pty Limited and Others (2006) 149 IR 361 at [8]-[9]. In any event, the evidence established that Tristar did, on or about 26 February 2007, send written notice of the proceedings to each of the Commonwealth and State Attorneys-General. Copies of the notices are annexed to the affidavit of Mr Berry. None of the Attorneys-General so notified sought to appear in the proceedings.
13 In relation to the second question, Tristar submitted, notwithstanding that its jurisdictional application involved the resolution of a constitutional question, that the Commission had jurisdiction to determine such a question about the limits of its own authority provided that its decision would not be final and binding. No party made any contrary submission.
14 We accept Tristar's submission in this respect. Section 30 of the Judiciary Act provides that all matters arising under the Constitution or involving its interpretation are within the original jurisdiction of the High Court of Australia. Section 39(2) of the Judiciary Act provides that the "several Courts of the States" are invested with federal jurisdiction in all matters in which the High Court has original jurisdiction, subject to identified conditions and restrictions which are not presently relevant. The earlier stated conclusion that the Commission as currently constituted is not a court has the consequence that s 39(2) does not confer upon it federal jurisdiction to determine constitutional questions.
15 However, that is not to say that the Commission is not competent to consider and reach an opinion about a constitutional question relevant to its own jurisdiction. This question of the power of administrative tribunals to consider questions going to their jurisdiction was considered by Brennan J (as he then was), sitting as President of the Administrative Appeals Tribunal, in Re Adams and the Tax Agents Board (1976) 12 ALR 239. At 240, his Honour said:
An administrative body with limited authority is bound, of course, to observe those limits. Although it cannot judicially pronounce upon the limits, its duty not to exceed the authority conferred by law upon it implies a competence to consider the legal limits of that authority, in order that it may appropriately mould its conduct. In discharging its duty, the administrative body will, as part of its function, form an opinion as to the limits of its own authority. The function of forming such an opinion for the purpose of moulding its conduct is not denied to it merely because the opinion produces no legal effect.