28 The jurisdiction to grant relief in the nature of certiorari is found in s 69 of the Supreme Court Act 1970 (the SCA). Subsection (3) declares that the jurisdiction of the Court to grant relief of this character includes the jurisdiction to quash the ultimate determination of a tribunal if it is made on the basis of error of law on the face of the record.
29 In Craig v South Australia (1985) 184 CLR 163 at 179 the High Court explained the scope of jurisdictional error in the context of the review of the decisions of an administrative tribunal in this way:
If such an administrative tribunal falls into an error of law which causes it to identify a wrong issue, to ask itself a wrong question, to ignore relevant material, to rely on irrelevant material or, at least in some circumstances, to make an erroneous finding or to reach a mistaken conclusion, and the tribunal's exercise or purported exercise of power is thereby affected, it exceeds its authority or powers. Such an error of law is jurisdictional error which will invalidate any order or decision of the tribunal which reflects it.
30 Section 69(4) of the SCA provides that the tribunal's reasons for its ultimate determination are to be taken to be part of the face of the record for the purposes of subsection (3).
31 By his amended summons the plaintiff set out his grounds of appeal as follows:
Grounds one. 1) The Second Defendant erred in law, and erred in the exercise of their jurisdiction, in holding that "grounds of appeal" existed, namely the application of "incorrect criteria" or "demonstrable error", justifying the referral of the matter to an appeal panel pursuant to section 327. Particulars. 1.1) No "demonstrable error" or "application of incorrect criteria", being grounds 327(3)(c) and (d), was pleaded by the First Defendant. Rather, it was pleaded that the decision was made without the medical specialist having seen the First Defendant's medical reports (paragraph 10 of the First Defendant's submissions on the application to appeal).
…
Grounds four. 4) The appeal panel to accord the Plaintiff procedural fairness in proceedings to a determination of the matter "on the papers" without hearing further from the parties, either in writing, or by holding an assessment hearing, on the erroneous basis that both parties supported such a course. Particular. 4.1 The Plaintiff had expressly requested (in paragraph 8 of their submission opposing the appeal from the decision of the AMS) that the matter be determined "on a hearing basis so as to allow further oral submissions". 4.2 Procedural fairness required that the Plaintiff be informed of any decision by the appeal panel to determine the matter "on the papers", in order that there may be an opportunity to be heard by way of written submission on the merits of the case (rather than the merits of allowing an appeal to proceed to which the Plaintiff submission were directed).
Grounds five. 5) The appeal panel failed to exercise its jurisdiction, failed to understand that (sic) nature of its task, and erred in law, in failing to ask whether or not there was a "demonstrable error" or "application of incorrect criteria" in the decision of the AMS, so as to permit the appeal panel to substitute its own assessment (incorrectly following Vegan at first instance, which is currently reserved in the Court of Appeal.
32 Before turning to the way the plaintiff put his case on each of the grounds it is convenient to set out the relevant parts of a number of the provisions of Chapter 7 Part 7 of the Act, which deals with medical assessment.
33 Section 325(2) provides:
(2) A medical assessment certificate is to be in a form approved by the Registrar and is to:
(a) set out details of the matters referred for assessment, and
(b) certify as to the approved medical specialist's assessment with respect to those matters, and
(c) set out the approved medical specialist's reasons for that assessment, and
(d) set out the facts on which that assessment is based.
(3) If the Registrar is satisfied that a medical assessment certificate contains an obvious error, the Registrar may issue, or approve of the approved medical specialist issuing, a replacement medical assessment certificate to correct the error.