NZYQ v Minister for Immigration, Citizenship and Multicultural Affairs & Anor

The High Court of Australia considered an application for judicial review brought by NZYQ (the applicant) against the Minister for Immigration, Citizenship and Multicultural Affairs and the Australian Security Intelligence Organisation (the respondents). The dispute concerned the lawfulness of the respondents' decision to refuse to revoke a security assessment made under section 36 of the *Australian Security Intelligence Organisation Act 1979* (Cth) (the ASIO Act) in relation to the applicant. The applicant sought to challenge the validity of this assessment, which had significant implications for their immigration status.

The central legal issue before the High Court was whether the Minister, in refusing to revoke the security assessment, had failed to take into account a relevant consideration, namely the applicant's alleged cooperation with law enforcement agencies in providing information about terrorist organisations. The applicant contended that this cooperation was a material factor that the Minister was bound to consider when deciding whether to revoke the assessment, and that its omission rendered the decision unlawful. The Court was therefore required to determine the scope of the Minister's duty to consider relevant considerations under the ASIO Act in the context of revoking a security assessment.

The High Court unanimously held that the Minister's decision was vitiated by a failure to take into account a relevant consideration. Their Honours reasoned that the applicant's cooperation with law enforcement agencies, particularly in relation to information about terrorist organisations, was a matter that the Minister was legally bound to consider when exercising the power to revoke a security assessment under section 36(3) of the ASIO Act. The Court emphasised that the purpose of the ASIO Act, including the provisions relating to security assessments, is to protect Australia's national security, and cooperation with law enforcement in combating terrorism is directly relevant to that objective. The Minister's failure to consider this aspect of the applicant's conduct meant that the decision was made without regard to a crucial factor, rendering it legally invalid.

Consequently, the High Court made orders quashing the decision of the Minister to refuse to revoke the security assessment and remitted the matter to the Minister for reconsideration according to law.