PROCEDURAL FAIRNESS
28 It was not disputed that the Tribunal was bound to accord procedural fairness to Captain McAuley when dealing with his application. Each of the grounds alleges that the Tribunal in one way or another breached this obligation. It will, therefore, be convenient to deal first with the relevant principles and then to consider each complaint of denial of procedural fairness.
29 Procedural fairness is intended to ensure that those who may be adversely affected by administrative decisions are not prejudiced by "practical injustice": see Re Minister for Immigration and Multicultural and Indigenous Affairs; Ex parte Lam (2003) 214 CLR 1 at 14 (Gleeson CJ). The guiding principle is one of fairness: see VHAP of 2002 v Minister for Immigration and Multicultural and Indigenous Affairs (2004) 80 ALD 559 at 566 (Allsop J, with whom Gyles and Conti JJ agreed on this point).
30 The parties both accepted that the application of the principle depended on the particular facts of any case. This was emphasised by Weinberg J in Applicants M1015/2003 v Minister for Immigration and Multicultural and Indigenous Affairs [2004] FCA 1309 at [54]:
"Whether or not there has been a denial of procedural fairness in any given case is largely dependent upon the particular facts of that case. Where the decision-maker has relied upon adverse information, without providing any opportunity to comment upon it, the question whether the decision is vitiated will depend upon a range of factors. These include the importance of the material to the ultimate decision, as well as the nature of that material. Some information is purely factual and entirely incontrovertible. There may simply be no answer to it. Other information may involve a combination of fact and opinion, and may be contentious. In relation to information of that kind, the denial of the opportunity to comment upon it may give rise to procedural fairness. Moreover, some matters are so blindingly obvious as not to require any comment or submission. In such cases, the fact that there has been no opportunity to comment will be of little or no significance."
31 The basic elements of procedural fairness were outlined by the Full Court (Northrop, Miles and French JJ) in Commissioner for Australian Capital Territory Revenue v Alphaone Pty Ltd (1994) 49 FCR 576 at 591-2:
"Where the exercise of a statutory power attracts the requirement for procedural fairness, a person likely to be affected by the decision is entitled to put information and submissions to the decision-maker in support of an outcome that supports his or her interests. That entitlement extends to the right to rebut or qualify by further information, and comment by way of submission, upon adverse material from other sources which is put before the decision-maker. It also extends to require the decision-maker to identify to the person affected any issue critical to the decision which is not apparent from its nature or the terms of the statute under which it is made. The decision-maker is required to advise of any adverse conclusion which has been arrived at which would not obviously be open on the known material. Subject to these qualifications however, a decision-maker is not obliged to expose his or her mental processes or provisional views to comment before making the decision in question."
32 The determination of procedures, required to be adopted in a particular case, in order to accord fairness to parties will also be influenced by the functions and powers of the tribunal concerned: see Minister for Immigration and Citizenship v Li (2013) 249 CLR 332 at 341-347 (French CJ); 355-362 (Hayne, Kiefel and Bell JJ); Weinstein v Medical Practitioners Board of Victoria (2008) 21 VR 29 at 34-39 (Maxwell P with whom Neave and Weinberg JJA agreed).
33 Captain McAuley pointed to a number of the provisions of Part VIIIC of the Defence Act and subordinate legislation made under it, which, he contended, governed and constrained the manner in which the Tribunal performed its functions. In doing so he generated some debate about the characterisation of the Tribunal: was it to be treated as being adversarial or inquisitorial in nature? It was accepted on both sides that the Tribunal did not fall neatly in one category rather than another. It was more of a hybrid: cf Matthew Groves, "The Duty to Inquire in Tribunal Proceedings" (2011) 33 Sydney Law Review 177 at 181. Proceedings in the Tribunal are adversarial to the extent that both an applicant and the Department of Defence can be represented at hearings (as occurred in this case) and were able to place material before the Tribunal and to make submissions. Legal representation was permissible. On the other hand, the Rules contained many provisions which were incompatible with an adversarial process. When an application was made to the Tribunal the Secretary of the Department was required to give the Tribunal a report on the reviewable decision (r 7(3)). The report was required to include findings on material questions of fact and the reasons for the impugned decision and a copy of any document on which the decision was based (r 7(4)). This material was to be provided to the applicant (r 8(1)). The Tribunal could direct the Secretary to search for and provide additional documents (r 9). The Tribunal was empowered to conduct its own research into the reviewable decision (r 6(1)). It was also empowered to inform itself on any matter in any way it considered appropriate (r 22(3)). It could invite a third party to make oral submissions at the hearing (r 13(1)). Subject to any legislative constraints the Tribunal's procedure was to be determined in its discretion (r 22(1)). Formality was to be avoided (r 22(2)). The Tribunal was not bound by the rules of evidence: (r 22(3)).
34 The Tribunal's relevant function was to "review" decisions. This required it to consider the evidence and arguments placed before it and any other relevant information properly obtained by it. It did not, however, so it was said, have broad investigatory powers. It was, for example, submitted that r 13(1) contained an implied limitation on the broader power conferred by r 22(3). This was because r 13(1) contemplated the making of submissions by the invited person rather than the giving of evidence. The Tribunal could not, as a result, inform itself by taking evidence from third parties.
35 Rule 22 is in materially the same terms as s 33 of the Administrative Appeals Tribunal Act 1975 (Cth). Equivalent provisions appear in the legislation governing the operation of many other statutory tribunals. Such provisions confer broad discretionary powers on tribunals as to how they conduct their proceedings and how they obtain information which they consider to be necessary in order to perform their statutory duties. Ordinarily, they will rely on the parties or the persons appearing before them to provide relevant information. Provisions such as r 22 empower a tribunal, if so minded, to obtain further evidence. That evidence cannot, however, be brought to account without first affording a person adversely affected by it procedural fairness. There is nothing in the legislation or the Rules which regulates the Tribunal which compels a different approach.