47 The process by which that conclusion was reached illuminates the relevance and importance of the circumstances of the individual case in determining whether an inference of apparent bias will be drawn from the fact of communications between a judicial officer and one only of the parties. Gibbs CJ said (at 349-50) (emphasis added):
In the present case it was wrong of the counsellor to attempt to influence the judge and ill-advised for the judge to speak to the counsellor in private. Counsel for the prosecutor referred us to authorities which establish that a judge should not sit to hear a case if in all the circumstances the parties or the public might entertain a reasonable apprehension that the judge might not bring an impartial and unprejudiced mind to the resolution of the question involved in it: see Livesey v NSW Bar Association . I rather think that the present case is governed by an analogous principle, that justice must not only be done but must manifestly be seen to be done; when a judge has received in private representations concerning a case, the court will not inquire whether the representations in fact worked to the prejudice of the party against whose interest they were made - it is enough that they might do so: see Kanda v Government of Malaya . Examples of a strict application of the principle are provided by R v Justices of Bodmin; Ex parte McEwen and Garrihy v Wyatt . In the present case, the counsellor had formed a view adverse to the husband. She had expressed that view, not only in her report, but also in the presence of counsel in the judge's chambers. She had gone to see the judge because she believed that it would be detrimental to the child to remain for long in the husband's custody. The husband was entitled, not unreasonably, to fear that the counsellor may have made remarks adverse to him when she was alone with the judge and that the judge might have been influenced by them. Justice would not be manifestly seen to be done if in those circumstances the judge decided the case. The judge should not continue to hear the case and the order nisi for prohibition should be made absolute.
48 Mason J said (at 351, 355-7) (emphasis added):
As McInerney J pointed out, the receipt by a judge of a private communication seeking to influence the outcome of litigation before him places the integrity of the judicial process at risk. A failure to disclose that communication will seriously compromise the integrity of that process. On the other hand, although the terms of a subsequent disclosure by the judge of the communication and a statement of its effect in some, perhaps many, situations will be sufficient to dispel any reasonable apprehension that he might be influenced improperly in some way or other , subsequent disclosure will not always have this result. The circumstances of each case are all important. They will include the nature of the communication, the situation in which it took place, its relationship to the issues for determination and the nature of the disclosure made by the judge .
The problem is governed by the principle that a judge should disqualify himself from hearing, or continuing to hear, the matter if the parties or the public entertain a reasonable apprehension that he might not bring an impartial and unprejudiced mind to the resolution of the issues: Reg v Watson; Ex parte Armstrong ; Livesey v NSW Bar Association . This principle, which has evolved from the fundamental rule of natural justice that a judicial officer should be free from bias, reflects a concern with the need to maintain public confidence in the administration of justice. This concern is expressed in the cognate principle that, not only must justice be done, it must be seen to be done.
…
But the critical question is whether in all the circumstances the parties or the public would reasonably apprehend that the judge would not bring an impartial and unprejudiced mind to a hearing and determination of the custody proceedings between the parents of the child . Or to put it another way, the question is whether the principle that justice must be seen to be done requires that the judge be disqualified. In considering this issue the first point to be made is that the view which Ms Bernet expressed to the judge in private chambers during the luncheon adjournment strongly favoured the wife. It appears that she asked that the child be placed with the mother and said that the sooner that this took place the better it would be emotionally for the child . It is true that Ms Bernet had expressed a similarly strong view in favour of the wife in her report dated 31 January 1986 which became available to counsel during the hearing on 4 February. In that report Ms Bernet described the child as being "on the way to a severe anxiety neurosis". However, this was the first indication that the child might be affected in such a way. It excited a question as to Ms Bernet's qualifications (which were not known) to express such an opinion. It made it very likely that Ms Bernet would be called as a witness, more particularly because the husband wished to have the child examined by a psychiatrist or psychologist. One other circumstance must be mentioned and it is important. Ms Bernet, before seeing the judge, had spoken to the wife during the course of proceedings on 5 February, saying that the proposed adjournment was outrageous and that she proposed to do something about it. In fact she discussed the matter with the Director of Court Counselling at Parramatta before seeing the judge.
In this situation the discussion between the judge and Ms Bernet was significant in several respects. It resulted from an approach by a potential witness who strongly supported the wife's case and seems to have expressed that support to the judge. She apparently informed the judge of her qualifications and thereby indicated that her opinion was that of a qualified expert, a matter which was in question in the proceedings. Moreover, the reference in the discussion to the Director of Court Counselling at Parramatta suggests the possibility, not negatived by the evidence, that Ms Bernet claimed that her approach was indorsed by the Director. In disclosing the approach which had been made, the judge did not reflect adversely on it. On the contrary the judge seems to have proceeded on the footing that the initiative taken by Ms Bernet required serious consideration by the court and counsel for the parties. In effect the judge invited counsel to respond to the recommendations of the court counsellor and to obtain instructions to enable them to do so. The judge did not treat the court counsellor's approach as irregular and did not assure counsel that she intended to disregard completely what the court counsellor had said to her .
It is evident from what I have said that there is a firm basis for a reasonable apprehension that the judge will not bring to bear an impartial and unprejudiced mind on the resolution of the custody issue. It is not to the point to say that the prosecutor has failed to establish the existence of any bias on the part of the judge. The courts have always refused, for obvious reasons, to embark upon an inquiry whether a judge will determine the issues impartially and with an unprejudiced mind. It would be idle for this Court to say that it is confident that the judge will act impartially. We have to ask ourselves how the matter would appear, viewed reasonably, to the public and the parties. And when we ask this question the answer that immediately presents itself is that the judge, who in all probability would be called upon to evaluate the correctness of the opinion of the court counsellor and her credibility as a witness, had the unprecedented advantage of a private discussion with her on the very issue for decision in the case, the counsellor being a convinced, and perhaps convincing, advocate of the wife's cause in the case. The fact that the counsellor is an officer of the court is a matter which enhances, rather than diminishes, cause for concern. A fair-minded observer, as well as a concerned parent who is a party to the litigation would naturally and rationally conclude that the counsellor's standing as an officer of the court would ensure that her opinion would carry weight with the judge. The subsequent discussion between the judge and counsel in private chambers would have done nothing to dispel that cause for concern. The case is plainly one in which the principle that justice must manifestly be seen to be done requires that the matter be heard by another judge: see Goold v Evans & Co .
49 Wilson J (who dissented, holding that no reasonable apprehension of bias arose) said (at 360-1)(emphasis added):
The prosecutor complains of the conduct of the judge in allowing the counsellor to speak to her in private concerning the case and then in permitting, in the presence of counsel representing each of the parties, a general discussion to proceed in her chambers concerning procedural arrangements attending the adjournment.
There is no transcript of any conversation that took place in the judge's chambers. However, although the judge does not detail in precise terms the matters that were referred to, it does appear that before counsel were called in the counsellor told the judge that having spoken to the Director of Court Counselling at Parramatta she wished to make the two recommendations to which reference has already been made. When counsel joined them, the judge said that the Counselling Service, having regard to the welfare of the child, was extremely concerned about the length of an adjournment and asked the counsellor to repeat the two recommendations that she wished to make. In the course of the discussion that followed the judge mentioned that the counsellor's professional qualifications were those of a clinical psychologist. Reference was made to the counsellor's recommendation, expressed in her second report, that it would be better for the child if she were placed in the custody of the mother whereupon the judge said, in effect, that for that to happen there would have to be a hearing of an application for interim custody. With regard to the recommendation that separate representation be provided for the child, counsel for the wife expressed support for that view and foreshadowed an application to that effect. Although there is no suggestion that any other aspects of the case were referred to in the private discussion between the judge and the counsellor, it remains an important fact requiring consideration, as counsel for the prosecutor correctly submitted, that the conversation occurred at all. However the apprehension that might reasonably be generated by such a happening can only be determined in the light of all the circumstances including the subsequent conduct of the judge .
50 Brennan J said (at 370-1)(emphasis added):
Here, it is known that a counsellor whose views are antipathetic to the husband's case, saw the judge privately and had a conversation with her which reinforced the counsellor's concern (as stated in the report) that the child ought not be allowed to remain in the husband's custody. The judge ascertained Ms Bernet's qualifications to make a diagnosis that the child was in the early stages of a neurotic process. Ms Bernet made a submission to the judge with reference to the order which the judge should make during the adjournment, and that submission reinforced the view she had expressed in the report that the wife should have the custody of the child. The judge thus had a private conversation with an expert witness whose opinion was to be challenged, and it might reasonably be thought that that conversation enhanced the witness' credibility in the judge's eyes. Then a discussion took place in the presence of counsel in which the judge sought confirmation of the counsellor's views that the child should be placed in the wife's custody as soon as possible. An impression that the judge was influenced by the discussions she had had privately was strengthened by the judge's request to counsel to seek instructions on the recommendations which Ms Bernet had made.
It is reasonable for the husband to apprehend in those circumstances that the judge will not be able, however conscientiously she tries, to remove from her mind the impermissible effect of the discussions she had in chambers and thus to bring an impartial and unprejudiced mind to the determination of the matter pending in the court . Acknowledging the good faith of all involved, it is none the less necessary to make absolute the order nisi. I would so order.
51 Dawson J, who also dissented, said (at 371-2)(emphasis added):
It is an understandable tendency to assume the existence of a reasonable basis for supposing bias where there is, as in this case, an apparent departure from the proper standards of judicial behaviour. But the whole of the circumstances must be considered and such a conclusion must be firmly established and should not be reached lightly : Reg v Commonwealth Conciliation and Arbitration Commission; Ex parte Angliss Group ; Reg v Watson; Ex parte Armstrong ; Reg v Lusink; Ex parte Shaw . Moreover, the whole of the circumstances are not confined to the conduct said to afford reasonable grounds for suspecting a lack of impartiality. They include what was done by the judge subsequently, which may be sufficient to eradicate any reasonable apprehension of bias notwithstanding an earlier lapse in the observance of proper procedures . It is clear that an initial failure to hear a party or to allow him to put his case may be cured by giving him an appropriate opportunity to be heard at a later stage: see Ridge v Baldwin . It seems to me to follow that it must also be possible to remove an apprehension of bias on the part of a judge which might otherwise arise out of the failure to hear a party. After all, that kind of bias is not bias through interest or preconceptions existing independently of the case . Suspicion of bias of the latter kind, where there are grounds for it, may well be ineradicable: see Reg v Australian Stevedoring Industry Board; Ex parte Melbourne Stevedoring Co Pty Ltd . Here the suggested bias is an inability to act impartially which is said to have been demonstrated by the fact that representations were made to, or evidence was heard before, the judge in the absence of the parties. Remembering that both parties were absent at the time, it does not seem to me to have been a situation which was necessarily incapable of correction either as regards fairness or as regards the appearance as well as the fact of impartiality.
The learned judge took steps to correct the situation which had arisen and I shall refer to these in a moment, but I should first observe that the conduct which is called in question took place in a somewhat special situation.
52 The passages to which I have referred in JRL establish that while the (mere) fact that an ex parte communication takes place is an important one, it is not decisive, and closer examination may show that the informed reasonable lay observer might not form an apprehension of bias despite such communications. It will depend on the facts of each case whether communications between a judicial officer and one party to the exclusion of the other give rise to a reasonable apprehension of bias, and one must look to the whole of what happened to establish whether such an apprehension should be inferred. The reasonable and fair minded lay observer according to whose standards the question of ostensible bias is judged is taken to have knowledge of the material objective facts [ Laws v Australian Broadcasting Tribunal (1990) 170 CLR 70, 95 (Deane J); Kartinyeri v The Commonwealth (1998) 156 ALR 300, [16]; S&M Motor Repairs Pty Ltd v Caltex Oil (Australasia) Pty Ltd (1988) 12 NSWLR 358, 380F-G, 381D-E (Priestley and Clarke JJA); Johnson v Johnson (2000) 201 CLR 488, 493-494 (Gleeson CJ, Gaudron, McHugh, Gummow and Hayne JJ), 508-509 (Kirby J)]. In S&M Motor Repairs , Priestley and Clarke JJA, said (at 380F-G) that for the apprehension of the parties or the public to be reasonable, it must arise upon an understanding of the actual circumstances in which the claim of possible bias is made, and added (at 381D-E):
We stress that whenever a court is called on to decide whether disqualifying bias or apprehension of bias exists all the circumstances of the particular case must be looked at.