Ilamsingham, Ex parte - Re Ruddock

Ilamsingham, Ex parte - Re Ruddock concerned an application for an order of habeas corpus made by Mr. Ilamsingham, who was detained in immigration detention. The application was heard by Hayne J in chambers. The core of the dispute was whether Mr. Ilamsingham's continued detention was lawful under the Migration Act 1958 (Cth).

The primary legal issue before the Court was whether the Minister for Immigration and Multicultural Affairs had exercised the power to detain Mr. Ilamsingham in accordance with the provisions of the Migration Act. Specifically, the Court had to consider whether the Minister's delegate had formed the necessary belief that Mr. Ilamsingham was an unlawful non-citizen and whether that belief was based on reasonable grounds, as required by section 189(1) of the Act.

Hayne J found that the delegate's decision to detain Mr. Ilamsingham was vitiated by a failure to properly consider the evidence before them. The delegate had relied on a report that contained factual inaccuracies and had not adequately addressed the submissions made by Mr. Ilamsingham. Consequently, the delegate had not formed a belief that was based on reasonable grounds, rendering the detention unlawful. The Court applied the principle that detention under section 189(1) is a significant curtailment of liberty and must be exercised strictly in accordance with the statutory requirements.

The Court ordered that Mr. Ilamsingham be released from immigration detention.