Application of relevant principles
134 The relevant legal principles have been identified by Tobias JA, and need not be repeated. The resolution of the present case turns upon their application to particular circumstances. However, it is convenient to identify a number of aspects of the established test.
135 First, it is not infrequently suggested that a test which only requires that the fair-minded lay observer "might" reasonably apprehend that the judge "might" not bring an impartial mind to the resolution of the case, imposes an undemanding burden on the applicant seeking prohibition. However, the epithet "undemanding" may be self-fulfilling if accepted unquestioningly. The expression of the test demonstrates that the fair-minded observer is not required to identify judicial incapacity as a probability, nor is the Court required to identify the observer's state of mind on the balance of probabilities. So expressed, the test reflects the underlying policy, not merely to protect impartial justice, but also to maintain public confidence in the impartiality of the administration of justice.
136 Secondly, this is an area (defamation being another) where the court, instead of assessing for itself the standards of reasonable behaviour, incorporates a circumlocution by reference to the state of mind of a "fair-minded lay observer". That construct reflects the importance of the element of public confidence in that it requires the Court to look beyond its own assessment of the circumstances and that of a lawyer who may have a greater understanding of the way in which justice is administered than would be expected of members of the general public. That point of distinction is, however, difficult to identify with any degree of precision as the test is usually explained as requiring a greater understanding of how justice is administered than would be expected of members of the public chosen randomly: see, eg, Johnson v Johnson at [13] (Gleeson CJ, Gaudron, McHugh, Gummow and Hayne JJ), [53] (Kirby J) and [80] (Callinan J); Concrete Pty Ltd v Parramatta Design & Developments Pty Ltd [2006] HCA 55; 229 CLR 577 at [177] (Callinan J) and generally, Aronson, Dyer and Groves, Judicial Review of Administrative Action (4th ed, Lawbook Co 2009) at [9.80]-[9.95].
137 Thirdly, there is a degree of obscurity about the level of faith with which the observer is expected to view the administration of justice. He or she is not expected to have any knowledge of the particular character or ability of the judge in question, but is entitled to take into account statements made in the course of proceedings. One can only say that the description of the observer as "fair-minded" is designed to exclude the unduly gullible and the unduly cynical.
138 Fourthly, it is likely, and perhaps inevitable, that an appellate judge reviewing the circumstances at trial will form a view as to whether he or she holds a reasonable apprehension of the relevant kind. However, if satisfied that he or she does not hold such an apprehension, and in circumstances where the trial judge has disavowed any difficulty in dealing with the case on the merits, by what standard and process of reasoning does the appellate judge determine that the fair-minded lay observer would reach a different conclusion? The court does not poll public opinion and, if it did, it would undoubtedly discover a range of views. The fictional fair-minded lay observer is, of course, a construct, but it is not entirely clear whether he or she views the independence and objectivity of the judicial mind with greater or less trust than do lawyers and fellow judges. There appears to be an assumption underlying the judgments in this area that the public has less faith than do the legally trained themselves in the ability of legal training to restrain objectivity and avoid pre-judgment.
139 Fifthly, the test may operate somewhat differently depending on the kind of apprehension which is raised. In Webb v The Queen [1994] HCA 30; 181 CLR 41 at 74-75, Deane J considered four distinct though overlapping categories of case, identified as "disqualification by interest", "disqualification by conduct", "disqualification by association" and "disqualification by extraneous information". At least in this country, it is likely that the public would be thought to have little tolerance of a judicial officer who had received financial support from a party to proceedings. Different legal cultures may give rise to different sensitivities: cf Caperton v AT Massey Coal Co Inc 173 L.Ed.2d 1208 (2009), which involved the application of the Constitutional guarantee of due process in relation to a recently elected judge sitting on a case involving a major financial supporter of his election campaign. Further, disqualification by conduct is a broad category considered by Deane J to cover conduct both in the course of, and separate from, proceedings. The present case is concerned with conduct in the course of proceedings, albeit not the same proceedings. Further, it is concerned with conduct involved in an entirely proper determination of an issue in other proceedings, as compared with the expression of tentative views in the course of a hearing, or the use of intemperate language directed at a particular party or its lawyers.
140 Sixthly, care should be taken lest the application of the test, instead of enhancing public confidence in the administration of justice, actually undermines it. Consideration of a reasonable apprehension of bias assumes that there has been no actual pre-judgment. Where the trial judge expresses willingness and confidence in his or her ability to maintain an open mind and where that view is shared by the appellate judge, for reasons which are in each case articulated, to demand that the trial judge be disqualified tends to demonstrate lack of faith in the proper administration of justice, rather than the contrary. For the courts to adopt such a view does not self-evidently promote public confidence. In such a case, there is a real risk that the applicant is seen to be manipulating the system, not to avoid a prejudiced mind, but to avoid an adverse result based on a fair and unchallenged opinion, established by reference to the facts and circumstances then revealed in the evidence, and which may with proper consistency be maintained in the absence of evidence suggesting a different conclusion. Too ready a willingness to allow such a result would undoubtedly undermine public confidence in the administration of justice.
141 Seventhly, it is important to treat questions of pre-judgment as reflecting one set, albeit a very important set, of values in the administration of justice: other values must also be considered. Thus, the fact that a judge reads inadmissible evidence in order to rule on its admissibility should not give rise (generally) to any reasonable apprehension of pre-judgment on the basis of a tainted mind. On one approach, it may be said that the fair-minded observer will acknowledge the ability of a judicial officer to put aside prejudicial, even inflammatory, material, once it has been ruled inadmissible. The insidious effects of such material are, on that approach, to be ignored. On the alternative approach, the absolute value of impartiality is being tempered by the importance of the need for the administration of justice to proceed in a reasonably expeditious and orderly fashion without a risk of trials being routinely aborted. In relation to many civil proceedings, the need to take account of such values is mandated by provisions such as ss 56, 57 and 58 of the Civil Procedure Act 2005 (NSW).
142 Eighthly, in relation to the Tribunal, attention must be paid to the statutory scheme under which it operates. It is constituted by a judge of the District Court, or a person so qualified: DDT Act, s 7(2). Further, it is given particular powers which might be seen to affect any general expectation as to the manner in which it would operate. Thus, although the rules of evidence will generally apply (s 25(2)) the rules are relaxed in favour of the expeditious operation of the Tribunal by a number of provisions:
" 25 Evidence in proceedings before the Tribunal
…
(3) Historical evidence and general medical evidence concerning dust exposure and dust diseases which has been admitted in any proceedings before the Tribunal may, with the leave of the Tribunal, be received as evidence in any other proceedings before the Tribunal, whether or not the proceedings are between the same parties."
143 There is a similar provision in respect of any material obtained by discovery or interrogatories in other proceedings: s 25A. Further, s 25B provides:
" 25B General issues already determined
(1) Issues of a general nature determined in proceedings before the Tribunal … may not be relitigated or reargued in other proceedings before the Tribunal without the leave of the Tribunal, whether or not the proceedings are between the same parties.
(1A) If an issue of a general nature already determined in proceedings before the Tribunal (the earlier proceedings ) is the subject of other proceedings before the Tribunal (the later proceedings ) and that issue is determined in the later proceedings on the basis of the determination of the issue in the earlier proceedings, the judgment of the Tribunal in the later proceedings must identify the issue and must identify that it is an issue of a general nature determined as referred to in this section.
(2) In deciding whether to grant leave for the purposes of subsection (1), the Tribunal is to have regard to:
(a) the availability of new evidence (whether or not previously available), and
(b) the manner in which the other proceedings referred to in that subsection were conducted, and
(c) such other matters as the Tribunal considers to be relevant."
144 These provisions provide a statutory indication that issues can, in the circumstances identified, be pre-determined and may not necessarily be relitigated or reargued, even if the party adversely affected was not involved in the earlier proceeding.
145 These provisions were not relied upon the present case; indeed, on the contrary, the Tribunal was at pains to identify the fact that it had not determined particular issues adversely to the applicant on a final basis and would provide the applicant with an opportunity to call such evidence, engage in such further cross-examination and make such further submissions as it thought fit. Nevertheless, the fact that a different approach might be available in respect of "issues of a general nature" indicates a statutory intention that the Tribunal not be required to reassess such matters repeatedly. Further, ss 25(3) and 25A appear to limit the right of a party to relitigate questions of admissibility or exercises by way of discovery and interrogatories, in later proceedings.
146 Ordinarily, rules of procedural fairness would entitle a party to resist the admissibility of material or to reagitate issues of a general nature, despite the fact that determinations had been made by the Tribunal in earlier cases. However, the party adversely affected could not complain of pre-determination which is permitted by the statute. Where the party obtained leave to reagitate the issue, there may be no preclusion of an application for disqualification based on a reasonable apprehension of bias, but such an argument would need to be presented against the background of the special statutory provisions, and against the possibility that the grant of leave were seen as an indulgence.
147 All these are factors which the fair-minded lay observer should properly take into account as procedural characteristics of the particular tribunal in which the proceedings were brought.
148 In this statutory scheme, an applicant would have some difficulty in demonstrating a reasonable apprehension of bias where: