Jurisdiction to review
23 The Act provides that the Inspector-General in Bankruptcy may review the Trustee's decision to file a notice of objection and, in turn, this decision may be reviewed by the AAT. Under s 149N, the Inspector-General must cancel the objection if satisfied that the evidence to support the existence of the grounds given for the objection is insufficient or that the reasons given for objecting on those grounds do not justify the making of the objection. These criteria, which also apply to review by the AAT of the decision of the Inspector-General, involve a merits based review.
24 However, this Court's jurisdiction to review decisions of the AAT is much more confined. It derives from s 44 of the Administrative Appeals Tribunal Act 1975 (Cth) ("AAT Act") which gives the Court power to review only questions of law; BTR v Westinghouse Brake & Signal Co (1992) 34 FCR 246 at 253. The Court is not entitled to substitute its own view on the merits of the case for that of the AAT. As Franki J remarked in Neal v Secretary, Dept of Transport (1980) 29 ALR 350 at 354:
"There is no appeal to this court on anything other than a question of law and therefore the court is not concerned with whether or not it would have come to the same conclusion as the Tribunal came to, but only with the question of whether the Tribunal erred in law.".
25 While there is no error in law merely in making a wrong finding of fact, this court can set aside a finding of fact by the AAT if there is an error of law which has vitiated the finding; Waterford v Commonwealth (1987) 163 CLR 54 at 77 per Brennan J. For a finding to be vitiated by an error of law it is necessary to show that the error affected the AAT's decision. An immaterial error of law will not suffice; BTR v Westinghouse Brake & Signal Co (supra) at 253-254.
26 The High Court has recognised that the distinction between questions of fact and questions of law, though vital in many fields of law, is notoriously difficult. The High Court's comment in Craig v South Australia (1995) 184 CLR 163 at 186, that almost any question that arises for determination by a judge can be "dressed in the garb of a question of law", provides some insight into the nature of the difficulty. The High Court also accepted in Collector of Customs v Agfa -Gevaert Ltd (1996) 186 CLR 389 at 394 that:
"Notwithstanding attempts by many distinguished judges and jurists to formulate tests for finding the line between the two questions, no satisfactory test of universal application has yet been formulated."
27 However, it is not necessary to formulate a "satisfactory test of universal application" in order to determine the proper scope of the court's jurisdiction in this case. It is not even necessary to characterise the "non-law" questions, whether as questions of fact, as a mixture of fact and opinion or otherwise. It is only necessary to decide whether those parts of the AAT's reasons for decision which have been challenged involve an error of law including an error which would vitiate a finding of fact
28 The possibility of a finding being vitiated by error of law requires the court to examine the reasoning of the AAT. The standard of reasoning required of an administrative tribunal has been discussed many times. The position is neatly summarised by Diplock LJ in R v Deputy Industrial Injuries Commissioner; ex parte Moore [1965] 1 QB 456 at 488:
The requirement that a person exercising quasi-judicial functions must base his decision on evidence means no more than it must be based upon material which tends logically to show the existence or non-existence of facts relevant to the issue to be determined, or to show the likelihood or unlikelihood of the occurrence of some future event the occurrence of which would be relevant. It means that he must not spin a coin or consult an astrologer, but he may take into account any material which, as a matter of reason, has some probative value in the sense mentioned above. If it is capable of having any probative value, the weight to be attached to it is a matter for the person to whom Parliament has entrusted the responsibility of deciding the issue.
29 Deane J relied on this view of Lord Diplock as the basis for the somewhat broader position articulated in Minister for Immigration and Ethnic Affairs v Pochi (1980) 31 ALR 666 at 689-690. His Honour held that the tribunal, as a matter of law, had to act on the basis that the facts as found were based on the evidence:
"on the balance of probability, to its satisfaction by some rationally probative evidence and not merely raised before it as a matter of suspicion or speculation or left, on the material before it, in the situation where the Tribunal considered that, while the conduct may have occurred, it was unable to conclude that it was more likely than not that it had."
30 This approach was rejected by the full Federal Court (Black CJ, von Doussa and Carr JJ) in Minister for Immigration and Multicultural Affairs v Epeabaka (1999) 84 FCR 411. In a joint judgment their Honours stated that the judgment of Mason CJ in Australian Broadcasting Tribunal v Bond (1990) 170 CLR 321 at 355 - 360 provides authoritative guidance in relation to findings of fact and related questions of illogicality in reasoning. Their Honours quoted (at 421) the following passage from Mason CJ's judgment:
"Thus, at common law, according to Australian authorities, want of logic is not synonymous with error of law. So long as there is some basis for an inference - in other words, the particular inference is reasonably open - even if that inference appears to have been drawn as a result of illogical reasoning, there is no place for judicial review because no error of law has taken place." [emphasis in original]
31 The difference is between whether there is any evidence supporting the challenged conclusion and whether the decision-maker ought to have made the decision. The latter question relates to the decision-maker's assessment of the probative value of the evidence that logically supports the decision.
32 In reviewing the decision of the AAT, I am also conscious of Lockhart J's sound, practical warning that the court should approach its task not "with an eye keenly attuned to the perception of error". The task should be approached "in a balanced way, not reading passages from the reasons for decision in isolation from others to which they may be related or taking particular passages out of the context of the reasons as a whole"; Politis v FCT (1988) 16 ALD 707 [Ext] at 708.