Plaintiff 195/2016 v Minister for Border Protection & Ors

The High Court of Australia considered an appeal by the applicant, identified as Plaintiff 195/2016, against the Minister for Border Protection and others. The dispute concerned the lawfulness of the applicant's detention and the validity of certain decisions made under the *Migration Act 1958* (Cth) concerning their immigration status. The applicant sought to challenge the Minister's decision to refuse to grant a protection visa and the subsequent detention.

The central legal issues before the High Court were whether the Minister's decision to refuse the protection visa was vitiated by jurisdictional error, and consequently, whether the applicant's ongoing detention was lawful. Specifically, the Court had to determine if the delegate of the Minister had failed to consider relevant considerations or taken irrelevant considerations into account when assessing the applicant's claims for protection, thereby rendering the decision invalid.

The Court analysed the scope of the duty of an administrative decision-maker to consider relevant information and the consequences of failing to do so. It was held that a failure to consider a relevant consideration, or the consideration of an irrelevant consideration, can constitute jurisdictional error if it goes to the substance of the decision-making power conferred by the statute. The Court found that the delegate had indeed failed to properly consider crucial aspects of the applicant's claims, which amounted to a jurisdictional error. This error meant that the decision to refuse the visa was invalid from its inception.

Consequently, the High Court allowed the appeal, quashed the decision of the primary judge, and set aside the Minister's decision to refuse the protection visa. The matter was remitted to the Minister for reconsideration according to law.