Plaintiff S211a/2018 & Ors v Honourable Justice Roger Marc Derrington & Ors

The applicants, identified as Plaintiff S211a/2018 and others, sought judicial review of decisions made by the Honourable Justice Roger Marc Derrington and the Commonwealth of Australia. The core of the dispute concerned the validity of certain interlocutory orders made by Justice Derrington in proceedings before the Federal Court of Australia, and the subsequent actions taken by the Commonwealth in relation to those orders. The matter came before Gageler J of the High Court of Australia.

The primary legal issue before Gageler J was whether the interlocutory orders made by Justice Derrington were valid and effective in law. This question involved an examination of the jurisdiction of the Federal Court and the powers of a single judge to make such orders, particularly in circumstances where the applicants contended that the orders were made without proper jurisdiction or in excess of power. The applicants also challenged the lawfulness of the Commonwealth's actions in reliance upon these orders.

Gageler J's reasoning focused on the fundamental principles of judicial power and the scope of the Federal Court's jurisdiction under the *Federal Court of Australia Act 1976* (Cth). His Honour considered the nature of interlocutory orders and the circumstances under which they may be challenged. The decision ultimately turned on the interpretation of the relevant legislative provisions and the established jurisprudence concerning the exercise of judicial power.

The application for judicial review was dismissed. Gageler J found that the interlocutory orders in question were validly made and that the Commonwealth's actions were lawful.