Ruddock, Re - Ex parte Prosecutors 1, 2, 3 and 4

The High Court of Australia considered an application for judicial review concerning the Minister for Immigration and Multicultural Affairs' decision to refuse to grant visas to four individuals, identified as Prosecutors 1, 2, 3 and 4. The applicants sought to challenge the Minister's decision, which had been affirmed by the Administrative Appeals Tribunal. The core of the dispute lay in the interpretation and application of certain provisions of the Migration Act 1958 (Cth) and associated regulations concerning the grant of visas.

The central legal issue before the High Court was whether the Minister, in exercising his non-compellable, non-discretionary power under s 48B of the Migration Act, had erred in law by failing to consider relevant considerations and by taking into account irrelevant considerations. Specifically, the applicants contended that the Minister had improperly focused on the applicants' alleged criminal conduct in their home country, rather than on the criteria for the grant of a protection visa as prescribed by the Act and regulations.

The High Court, in allowing the appeal, held that the Minister's decision was vitiated by an error of law. Their Honours found that the Minister had impermissibly treated the applicants' alleged criminal conduct as a determinative factor against the grant of a protection visa, despite the fact that the relevant legislative framework did not permit such a consideration in the context of s 48B. The Court reiterated the principle that administrative decision-makers must confine their considerations to those matters which the relevant statute requires them to consider, and must not have regard to extraneous matters. The Court quashed the decision of the Administrative Appeals Tribunal and remitted the matter to the Federal Court for determination according to law.