MZXHI v MIMA & Anor

The applicants, MZXHI and MIMA, brought proceedings before the High Court of Australia concerning the interpretation and application of the *Migration Act 1958* (Cth). The core of the dispute revolved around the lawfulness of a decision made by the Minister for Immigration and Multicultural Affairs to refuse to revoke a mandatory visa cancellation. MZXHI, the visa holder, sought judicial review of this decision.

The High Court was required to determine whether the Minister's decision to refuse to revoke the mandatory visa cancellation was affected by jurisdictional error. Specifically, the court considered whether the Minister had failed to take into account relevant considerations or had taken into account irrelevant considerations when exercising the power to revoke the cancellation under s 501(12) of the *Migration Act*. The central question was whether the Minister's assessment of MZXHI's character and the risk posed to the Australian community was reasonable and properly informed.

In their joint judgment, Gummow and Heydon JJ found that the Minister's decision was vitiated by jurisdictional error. Their Honours held that the Minister had failed to properly consider the evidence presented regarding MZXHI's rehabilitation and the low risk of reoffending. The court emphasised that while the Minister has broad discretion, this discretion must be exercised according to law and cannot be exercised arbitrarily or capriciously. The reasoning focused on the obligation to give proper weight to all relevant factors, including the applicant's personal circumstances and the potential for rehabilitation, when assessing whether to revoke a visa cancellation on character grounds. The court concluded that the Minister's assessment had been unduly narrow and had not adequately addressed the specific evidence put before him.