Grounds 1(b), 1(c), 3 and 4: Any factual errors were not jurisdictional errors
51 It is convenient to consider these grounds together. Each of these grounds relates to the same essential point. The point is that any error by the Tribunal was not a jurisdictional error. The appellant was not entitled to supplement the record by adducing fresh evidence merely in order to demonstrate an error of fact. And the Tribunal decision should not have been quashed for a mere error of fact within jurisdiction.
52 It is well established that a mere incorrect finding of fact (if it is not a jurisdictional fact) or merely unsound reasoning is not a jurisdictional error: Attorney-General (NSW) v Quin [1990] HCA 21; (1990) 170 CLR 1, 35-36 (Brennan J); SFGB v Minister for Immigration and Multicultural and Indigenous Affairs [2003] FCAFC 231; (2003) 77 ALD 402, 407-408 [20] (the Court); Minister for Immigration and Citizenship v SZNPG [2010] FCAFC 51 [20] (North and Lander JJ); SZRPT v Minister for Immigration and Border Protection [2014] FCA 24 [36] (Katzmann J).
53 Although an incorrect finding of fact (which is not a jurisdictional fact) will not be a jurisdictional error, it may be arguable that a jurisdictional error exists where an erroneous finding of fact can be characterised as unreasonable or irrational, even if the exercise of power is not expressly or impliedly conditioned upon reasonable and rational fact finding. In The Pilbara Infrastructure Pty Ltd v Economic Regulation Authority [2014] WASC 346 [141]-[194], I considered the authorities in relation to erroneous factual findings. The issue had been raised in that case but it had not been fully argued. My view was that recognition of a ground of review based upon unreasonable or irrational fact finding may require development of Australian law. Although there may be arguments in favour of such a development, it should not be undertaken without careful consideration. It involves the boundary of a fundamental divide which still exists in Australian law. That divide is sometimes expressed as one between decisions that are within power and those which are ultra vires. It is sometimes described as the difference between a review on the basis of legality and authority and a review on the basis of "merits". And it is sometimes characterised as an error which is "jurisdictional" and one which is "non-jurisdictional": see S Gageler "The Master of Words: Who Chooses Statutory Meaning?" in A Connolly and D Stewart (eds) Public Law in the Age of Statutes: Essays in Honour of Dennis Pearce (Federation Press, Sydney, 2015) 12, 15.
54 Some recent decisions have suggested that such review of findings of fact might have been contemplated by the decision of Hayne, Kiefel and Bell JJ in Minister for Immigration and Citizenship v Li [2013] HCA 18; (2013) 249 CLR 332, 365-366 [72] where their Honours spoke of a decision maker committing jurisdictional error by acting unreasonably in a legal sense in relation to "[t]he more specific errors in decision-making, to which the courts often refer" and committing "a particular error in reasoning, given disproportionate weight to some factor or reasoned illogically or irrationally". However, the reference to specific errors in decision making was accompanied by a footnote reference to Administrative Decisions (Judicial Review) Act 1977 (Cth), s 5(2) which is concerned with discretionary exercises of power, rather than findings of fact. Similarly, Gageler J referred to reasonableness as a condition of the exercise of a discretionary power as well as where reasonableness is a prerequisite to an exercise of a statutory power or performance of a statutory duty (370-371 [90]). His Honour did not say that mere unreasonable fact finding would suffice.
55 The primary judge proceeded upon the basis that the factual errors he found were jurisdictional errors. His Honour proceeded upon that view on the basis that the errors were, as he described them, the lynchpin, foundation or total basis for the Tribunal's ultimate decision. It is unnecessary in this appeal to explore whether, if his Honour's characterisation were correct, the errors would be jurisdictional errors. The reason why it is unnecessary to explore this point is because the errors that his Honour found do not rise above mere factual errors which were one of a number of considerations taken into account by the Tribunal.
56 As I have explained, the Tribunal's conclusion that Mr Singh had failed to establish that he was in a spousal relationship at the date of application (26 April 2012) involved balancing a number of matters. The matters upon which the Tribunal relied adversely to Mr Singh were (i) the limited joint finances of the parties, (ii) the absence of a joint household, and (iii) the Tribunal's concerns about the nature of their commitment to each other. The latter point was a matter of considerable significance for the Tribunal. As it explained, a significant motivation for Mr Singh's marriage to his sponsor was to obtain a visa.
57 The evidence concerning the date on which Mr Singh and the sponsor moved in together at the Caboolture property was relevant only to the factor concerning the absence of a joint household. Even with the additional evidence that Mr Singh tendered in the Federal Circuit Court, and which he sought to tender in this Court, the most that the Tribunal might have concluded was that Mr Singh moved in with the sponsor several days before the application. Even if the failure to reach such a conclusion were a factual error by the Tribunal, it would only have been one which was at the periphery of the Tribunal's reasoning. It could not be said to be an erroneous finding of fact which was legally unreasonable or illogical.
58 For that reason also, the evidence that Mr Singh tendered in the Federal Circuit Court, and the fourth C2B letter that he sought to tender in this Court, was inadmissible. In Waterford v Commonwealth [1987] HCA 25; (1987) 163 CLR 54, 77-78, Brennan J considered s 44 of the Administrative Appeals Tribunal Act 1975 (Cth) which is concerned with a right of appeal "on a question of law". His Honour explained that the consequence of the conclusion that there is no error of law simply in making a wrong finding of fact was that "an appellant cannot supplement the record by adducing fresh evidence merely in order to demonstrate an error of fact". These remarks, made in the context of an appeal on a question of law, are applicable also in relation to judicial review proceedings. As French CJ, Gummow and Bell JJ explained in Osland v Secretary to the Department of Justice [2010] HCA 24; (2010) 241 CLR 320, 331 332 [18] in relation to a provision concerning appeals from decisions made under s 50(4) of the Freedom of Information Act 1982 (Vic), "[d]espite the description of proceedings under the section as an 'appeal', it confers original not appellate jurisdiction; the proceedings are 'in the nature of judicial review'". See also Roy Morgan Research Centre Pty Ltd v Commissioner of State Revenue [2001] HCA 49; (2001) 207 CLR 72, 79 [15] (Gaudron, Gummow, Hayne and Callinan JJ).
59 Grounds 1(b), 1(c), 3 and 4 are also established. If there had been any factual error by the Tribunal as found by the primary judge, that factual error would not have been a jurisdictional error.