Commonwealth v McCormack

The Commonwealth of Australia (the Commonwealth) appealed to the High Court of Australia against a decision of the Federal Court of Australia concerning the validity of certain regulations made under the *Migration Act 1958* (Cth). The respondent, Mr McCormack, had challenged the lawfulness of his detention and the validity of the regulations under which he was detained.

The High Court was required to determine whether the regulations, which prescribed the circumstances and manner of detention for non-citizens awaiting deportation, were validly made and whether they were consistent with the *Migration Act* and the Australian Constitution. Specifically, the court considered whether the regulations unduly infringed upon the liberty of individuals and whether they were a proper exercise of the executive power delegated by Parliament.

The majority of the High Court found that the regulations were invalid. Their Honours reasoned that while the *Migration Act* conferred broad powers on the executive to detain non-citizens, the regulations went beyond the scope of the power granted by the Act. The court held that the regulations imposed conditions on detention that were not authorised by the statute and that such an overreach constituted an unlawful exercise of executive power. The principles of statutory interpretation, particularly the presumption against the executive being able to override fundamental rights without clear legislative authority, were central to the court's reasoning.

The High Court allowed the appeal, setting aside the orders of the Federal Court and declaring the relevant regulations invalid.