Applicant S70 of 2003 v Minister for Immigration & Multicultural & Indigenous Affairs

In the case of Applicant S70 of 2003 v Minister for Immigration & Multicultural & Indigenous Affairs, the applicants, who were non-citizens facing removal from Australia, sought judicial review of decisions made under the Migration Act 1958 (Cth). The applicants challenged the lawfulness of their detention and the process by which their removal was ordered. The High Court of Australia was tasked with determining the validity of the legislative framework underpinning these decisions.

The central legal issue before the Court was whether the provisions of the Migration Act, specifically those related to the detention and removal of non-citizens, were consistent with the requirements of the Australian Constitution. This included an examination of whether the exercise of power to detain and remove non-citizens was subject to judicial oversight and whether the impugned provisions contravened the principle of separation of powers.

The Court held that the provisions of the Migration Act, as applied to the applicants, were valid exercises of Commonwealth legislative power. The Court found that the detention and removal of non-citizens could be authorised by Parliament under the Constitution's laws respecting aliens. The Court further determined that the provisions did not infringe upon the principle of judicial review or the separation of powers. As a result, the applicants' challenge to the constitutional validity of the legislative provisions was rejected. Consequently, the appeal was dismissed, and the applicants were required to pay the costs of the first respondent.