Leave to appeal principles
11 The orders which the applicants seek to impugn on the appeal were made in the exercise of a discretionary judgment. Appellate review of discretionary judgments of this kind is limited. The principles stated in House v The King (1936) 55 CLR 499 at 505 apply:
It must appear that some error has been made in exercising the discretion. If the judge acts upon a wrong principle, if he allows extraneous or irrelevant matters to guide or affect him, if he mistakes the facts, if he does not take into account some material consideration, then his determination should be reviewed and the appellate court may exercise its own discretion in substitution for his if it has the materials for doing so.
12 Further, appellate courts exercise restraint before interfering with judgments concerning matters of practice and procedure. Thus, in Adam P Brown Male Fashions Pty Ltd v Philip Morris Inc (1981) 148 CLR 170 at 177, Gibbs CJ, Aickin, Wilson and Brennan JJ said:
Nor is there any serious dispute between the parties that appellate courts exercise particular caution in reviewing decisions pertaining to practice and procedure. Counsel for Brown urged that specific cumulative bars operate to guide appellate courts in the discharge of that task. Not only must there be error of principle, but the decision appealed from must work a substantial injustice to one of the parties. The opposing view is that such criteria are to be expressed disjunctively. … For ourselves, we believe it to be unnecessary and indeed unwise to lay down rigid and exhaustive criteria. The circumstances of different cases are infinitely various. We would merely repeat, with approval, the oft-cited statement of Sir Frederick Jordan in In re the Will of F.B. Gilbert (dec.) [(1946) 46 SR (NSW) 318 at 323]:
"… I am of the opinion that, … there is a material difference between an exercise of discretion on a point of practice or procedure and an exercise of discretion which determines substantive rights. In the former class of case, if a tight rein were not kept upon interference with the orders of Judges of first instance, the result would be disastrous to the proper administration of justice. The disposal of cases could be delayed interminably, and costs heaped up indefinitely, if a litigant with a long purse or a litigious disposition could, at will, in effect transfer all exercises of discretion in interlocutory applications from a Judge in Chambers to a Court of Appeal."
Section 24(1A) of the Federal Court of Australia Act 1976 (Cth) (FCA Act) is a legislative endorsement of the restraint to which their Honours referred in Adam P Brown.
13 The power to grant leave to appeal conferred by s 24(1A) also involves a discretionary judgment. The approach to the exercise of that discretion adopted in Décor Corporation Pty Ltd v Dart Industries Inc (1991) 33 FCR 397 has been influential. The Full Court (Sheppard, Burchett and Herrey JJ) enquired first, whether in all the circumstances, the judgment of the primary judge was attended by sufficient doubt to warrant it being reconsidered by the Full Court and, secondly, whether substantial injustice would result if leave were refused, supposing the decision to be wrong. Those tests are not to be applied in a rigid way, having regard to the variety of interlocutory decisions which may be the subject of an appeal. The Full Court in Samsung Electronics Co Ltd v Apple Inc [2013] FCAFC 138 at [19] spoke of the need for flexibility as follows:
The very width of the discretion and the prudence in not seeking to confine the manner in which it is to be exercised is a necessary corollary of the myriad of interlocutory decisions which may be made - ranging from interlocutory decisions affecting the substantive rights of parties (and effectively being final orders) to matters of practice and procedure (including decisions to extend time, the granting or refusal of adjournments and the filing of evidence). The different character of interlocutory decisions which may be made and the different factual and forensic circumstances in play when such decisions are made nevertheless have occasioned a different emphasis from one judgment to another upon one particular factor or factors rather than others.