Montgomery v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs & Anor

This matter concerned an application for a writ of habeas corpus brought by Shayne Paul Montgomery. The dispute arose in the Federal Court concerning the scope of cross-examination of a detaining officer. Specifically, the applicant sought to cross-examine the officer on the factual basis for their reasonable suspicion that Mr Montgomery was an unlawful non-citizen under section 189 of the *Migration Act 1958* (Cth). The Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs and the Minister for Home Affairs were the respondents. The High Court was asked to clarify the extent to which such cross-examination was permissible, given that certain constitutional questions had been removed to the High Court.

The central legal issue before the High Court was to determine whether the Federal Court retained jurisdiction to hear evidence and conduct cross-examination on the factual question of a detaining officer's reasonable suspicion under section 189 of the *Migration Act*, notwithstanding the removal of related constitutional questions concerning Mr Montgomery's status as an "alien" to the High Court. The applicant contended that the Federal Court had erroneously concluded that any question relating to aboriginality, including the reasonableness of the detaining officer's suspicion, had been removed to the High Court and was therefore not a matter that could be examined in the Federal Court.

The High Court clarified that the constitutional question removed to it concerned whether Mr Montgomery was an "alien" for the purposes of the Constitution, as articulated in ground eight of the application. This constitutional question did not encompass the factual inquiry into the detaining officer's reasonable suspicion under section 189 of the *Migration Act*. The Court emphasised that proceedings in the Federal Court were not under its supervision and that the Federal Court judge was not to be misled as to what had been removed to the High Court. The High Court indicated that the Federal Court retained jurisdiction to hear evidence and conduct cross-examination on the factual basis of the detaining officer's reasonable suspicion.