. . . The discretion of a court to determine a case at an early stage, when appropriate, has been repeatedly asserted (see Young v Rank [1950] 2 KB 510 ; Ramdsen v Ramsden [1954] 2 All ER 623 at 624; Union Bank of Australia Limited v Puddy [1949] VLR 242; Sampson v Edwards [1949] VLR 6)."
The principle to apply by a court entertaining a challenge to jurisdiction in a preliminary or threshold way was considered by the Supreme Court of New South Wales, Court of Appeal in Majik Markets Pty Limited v Brake and Service Centre Drummoyne Pty Limited (1991) 28 NSWLR 443; 39 IR 169. Kirby P observed (at 446; 170):
"Such a course is often a sensible one where a party has a substantial threshold argument which, if it succeeds, will knock out the claim and save the costs and inconvenience that attend a protracted hearing of proceedings on the merits. But, as with any threshold relief of this kind, it must be conserved to a clear case where it is plain that the invocation of the jurisdiction impugned is wholly misconceived or, upon analysis, lacks an arguable legal foundation. Necessarily, refusal of relief at the threshold will not finally determine that jurisdiction exists for any order which the Commission might make between the parties. This is because, to secure relief, the claimants must demonstrate that no order could be made which would be within jurisdiction. This burden, which is a heavy one, was accepted by the claimants."
. . .
We would draw from those authorities the proposition that whilst it is desirable for a case to be determined at an early stage it is only open to do so at the appropriate stage of the proceedings, that is, where the facts, either established by evidence or plainly agreed in terms, enable the Court to determine what the contract or arrangement is or, at least, the parameters of the contract or arrangement. In other words, it seems to us, unless the facts are sufficiently established to enable the Court to be satisfied it has the necessary material to reach a clear and final decision on the question then the appropriate stage has not been reached for such a a determination to be made.