Nguyen v Minister for Immigration

This matter concerned an application before Judge Howard of the Federal Circuit Court of Australia. The applicant, Mr. Nguyen, sought to challenge a decision made by the Administrative Appeals Tribunal. The central dispute revolved around the extent to which the Federal Circuit Court could review decisions of the Tribunal, particularly in light of a privative clause within the *Migration Act 1958* (Cth).

The primary legal issue before the Court was whether it retained jurisdiction to issue constitutional writs, such as prohibition or mandamus, in relation to a "privative clause decision" made by the Tribunal under the *Migration Act*. This question required the Court to consider the interplay between section 476(1) of the Act, which grants the Federal Circuit Court jurisdiction similar to the High Court under section 75(v) of the Constitution, and section 474 of the Act, which purports to make such decisions final and unchallengeable.

The Court reasoned that while section 474(1) renders a privative clause decision final and conclusive, it does not entirely extinguish the Court's jurisdiction to issue constitutional writs. Drawing on the High Court's decisions in *Minister for Immigration and Multicultural Affairs v Yusuf* and *Craig v South Australia*, the Court held that jurisdiction is retained if the Tribunal's decision is affected by "jurisdictional error." Jurisdictional error was explained as an error of law that causes the decision-maker to identify a wrong issue, ask a wrong question, ignore relevant material, rely on irrelevant material, or make a mistaken finding or conclusion, in a way that affects the exercise of power. Such an error means the decision-maker has exceeded their authority or powers.