62 The concluding sentences in this passage reveal that the reasoning turns in part upon the effect of the then privative clause on a decision of the Commission already made in favour of an applicant. In the present case, as in Solution 6, this Court is addressing the issue in a context prior to the extended privative clause now in place (s179) having any application. Nevertheless, the Court should not make an order in the nature of prohibition unless satisfied of a threatened jurisdictional error (see Aronson, Dyer & Groves, Judicial Review of Administrative Action 3rd ed, 2004, p695).
63 It is however open to this Court to frame relief in such manner as to allow the Commission to exercise its jurisdiction to determine, subject to the grant of leave to appeal, whether or not the Contract was or became unfair for the purposes of s106. This, as stated in Stevenson (at 201 per Mason and Jacobs JJ) and in Mitchforce (at 246[169] per Handley JA), is the very jurisdictional question committed to the decision of the Commission. The claimants ultimately sought no more than relief directed at precluding the Commission from giving effect to the Reich principle, which the claimants submit involves either jurisdictional error or a significant misapplication of the Act. This Court has power to issue a partial prohibition (or prohibition quoad) (see Ex parte Thomas; Re Arnold [1966] 2 NSWR 197, Re Media, Entertainment and Arts Allience; Ex parte Arnel (1994) 179 CLR 84). Alternatively, declaratory or injunctive relief with similar effect could issue, in a proper case, without the need to find threatened error of a jurisdictional nature (see Connor v Sankey [1976] 2 NSWLR 570 at 595-3, 622-3, Forster v Jododex Australia Pty Ltd (1972) 127 CLR 421).
64 The granting of limited relief in this Court also allows the Commission to address any costs issues referable to the Commission proceedings relating to the claimants' delay in raising in this Court the point they have pressed.
65 A court or tribunal may lawfully enter upon a particular inquiry, but so conduct itself as to misconstrue the nature of its power in such a way as to constitute jurisdictional error. In Uniting Church in Australia Property Trust (NSW) v Industrial Relations Commission of NSW in Court Session & Anor [2004] NSWCA 183, I said (at [54]):
The distinction between jurisdictional and non-jurisdictional error remains a fundamental part of Australian administrative law ( Craig v South Australia (1995) 184 CLR 163). Anisminic Ltd v Foreign Compensation Commission [1969] 2 AC 147 does not represent the law in Australia. But one insight stemming from Anisminic is that it is now more clearly understood than previously that "an error of law may amount to a jurisdictional error even though the [decision-maker that] made the error had jurisdiction to embark on its inquiry" (per Gibbs CJ in The Queen v Gray; Ex parte Marsh (1985) 157 CLR 351at 371. See also Coal and Allied Operations Pty Ltd v Australian Industrial Relations Commission & Ors (2000) 203 CLR 194 at 227-8 per Kirby J).
66 Frequently encountered statements that all questions of fairness are for the Commission alone (eg my reasons in QSR Ltd v Industrial Relations Commission of NSW & Ors [2004] NSWCA 199 at [58]) must be understood to mean that a decision as to fairness or otherwise made otherwise without jurisdictional error is not amenable to judicial review in this Court. But it could not possibly be the case that (speaking hypothetically) a Commission that reasoned that "this is unfair because the employee has red hair" would be jurisdictional. In Jordan CJ's memorable aphorism, there are mistakes and mistakes (Ex parte Hebburn Ltd; Re Kearsley Shire Council (1947) 47 SR(NSW) 416 at 420).
67 In my view, the application of the central principle in Reich (if it occurred) would involve an error of this jurisdictional nature.
68 However, lest I be wrong or my views not be shared by my colleagues, I propose the grant of declaratory relief, a remedy not bounded by the need to find jurisdictional error. The case is in my opinion apt for a declaration.
69 The claimants recognise that as a matter of general principle, this Court would not wish to preclude the Commission from considering whether its appellate jurisdiction is properly invoked. Nor could there be any basis for prohibition or declaratory relief to preclude the Full Bench from investigating (at least, subject to the restraints of appellate review: cf Whisprun) whether relief could be afforded consistent with avoidance of what in my view is the (erroneous) Reich principle.
70 This Court has jurisdiction to grant declaratory relief in a proper case in relation to issues that arise in the Commission (see Supreme Court Act, s48(1)(a)(ii), (2)(e)). Section 179 of the Act has not been engaged because there is no relevant decision or purported decision of the Commission.
71 Neither of the contending parties in these proceedings suggested that this Court lacked the jurisdiction or power to issue a declaration on the present issue, although Mr Searle submitted at one stage that declaratory relief should not go unless a threatened error of law were jurisdictional. I would reject the latter submission. It was also common ground, and undoubtedly correct, that there could be no suggestion that such a declaration would lack utility because it would have no bearing on the possible rights of the parties (however much they disagreed as to the extent to which the Reich principle was actually engaged). It was also common ground, and again undoubtedly correct, that such a declaration would in turn provide an undoubted jurisdictional basis for the High Court of Australia itself to consider the correctness of the Reich principle (if minded to do so).
72 In my view, this is a proper case for a declaration to issue. Whether or not the Reich principle is jurisdictional, it involves a matter of significant importance in the current jurisprudence of the Commission. It is an issue on which strong opposing views were voiced within the Commission prior to Reich and on which the Full Bench of the Commission in Court Session was closely but firmly divided. For reasons set out above, I am satisfied that Mr Truelove intends to invoke that principle if necessary.
73 I favour making no order as to the costs of these proceedings. I have regard to the proceedings being in the nature of a test case, the delay of the claimants and the fact that the claimants have not obtained the absolute relief they sought in the Summons.
74 I propose the following order: