MIMIA v Al Masri, MIMIA v Al Khafaji, SHDB v Godwin & Ors, Ex parte Cth AG

The High Court of Australia considered appeals from decisions of the Federal Court of Australia concerning the detention of asylum seekers. The primary dispute involved the lawfulness of the detention of Mr. Al Masri and Mr. Al Khafaji, who were held in immigration detention facilities. A separate, but related, matter concerned the lawfulness of the detention of Mr. Godwin and others, and the application for leave to appeal by the Commonwealth Attorney-General in relation to that matter. The High Court heard these matters together.

The central legal issue before the High Court was whether the executive government, acting under the authority of the Constitution and relevant legislation, could lawfully detain non-citizens who had not been granted a visa, even if there was no reasonable prospect of their removal from Australia in the foreseeable future. This raised questions about the scope of executive power, the meaning of "unlawful non-citizen" under the Migration Act 1958 (Cth), and the constitutional implications of prolonged, potentially indefinite, detention.

The High Court, by majority, held that the executive government did have the constitutional power to detain non-citizens who arrived in Australia without a valid visa, regardless of whether their removal was practicable. The Court reasoned that the power to detain was an incident of the constitutional power to make laws with respect to aliens and immigration, and that the Migration Act provided the legislative framework for such detention. The majority distinguished the present cases from previous authorities by emphasising that the detention was not punitive but was for the purpose of processing immigration matters and ensuring compliance with the Act, including the possibility of removal. The Court found that the detention of Mr. Al Masri and Mr. Al Khafaji was lawful under the provisions of the Migration Act.

In relation to the matter of Mr. Godwin and others, the High Court granted leave to appeal and, upon appeal, allowed the appeal, upholding the lawfulness of the detention in that case as well. Consequently, the appeals from the Federal Court in the matters of MIMIA v Al Masri and MIMIA v Al Khafaji were dismissed, and the appeal by the Commonwealth Attorney-General in the matter of SHDB v Godwin & Ors was allowed.