ASF17 v Commonwealth of Australia

The applicants, ASF17 and others, brought proceedings against the Commonwealth of Australia in the High Court of Australia. The dispute concerned the validity of certain provisions of the *Migration Act 1958* (Cth) and the *Australian Citizenship Act 2007* (Cth), as they applied to individuals who had been granted protection visas and subsequently had their citizenship cancelled. The applicants sought declarations that their detention was unlawful and that their removal from Australia was invalid.

The central legal issues before the High Court were whether the Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs had the power to cancel the citizenship of individuals who had been granted protection visas, and if so, whether such cancellation could lawfully result in their detention and removal from Australia. The applicants contended that their detention and potential removal were contrary to the *Migration Act* and the *Australian Citizenship Act*, and potentially engaged constitutional protections.

The Court ultimately held that the Minister did possess the power to cancel citizenship under the *Australian Citizenship Act* in the circumstances presented. However, the Court found that the *Migration Act* did not authorise the detention or removal of individuals whose citizenship had been validly cancelled. The reasoning focused on the interpretation of the relevant statutory provisions, particularly the interplay between the *Australian Citizenship Act* and the *Migration Act*, and the constitutional implications of detaining and removing citizens. The Court distinguished between the power to cancel citizenship and the consequences of such cancellation under migration law.

The High Court made declarations that the detention of the applicants was unlawful and that their removal from Australia was invalid. The Court ordered that the applicants be released from detention.