Re Canavan; Re Ludlam; Re Waters; Re Roberts; Re Joyce; Re Nash; Re Xenophon

The High Court of Australia considered whether six federal parliamentarians, namely Senator Canavan, Senator Ludlam, Senator Waters, Senator Roberts, Senator Joyce, and Senator Nash, and Senator Xenophon, were incapable of being chosen or of sitting as a senator or member of the House of Representatives by reason of contravening section 44(i) of the Constitution. The dispute arose from allegations that these parliamentarians had, at the time of their nomination or election, been subjects or citizens of a foreign power, thereby potentially contravening the constitutional prohibition against dual citizens sitting in Parliament.

The central legal issue before the Court was the interpretation and application of section 44(i) of the Constitution, which disqualifies any person who is a "subject or citizen or entitled to the rights or privileges of a subject or citizen of a foreign power" from being elected or sitting as a senator or member of the House of Representatives. The Court was required to determine whether the respondents, by virtue of their foreign citizenship or entitlement to foreign citizenship, were subject to this disqualification, and if so, whether any exceptions or mitigating circumstances applied.

The Court's reasoning involved a detailed examination of the historical context and intended meaning of section 44(i). It applied the principle that the section is a strict prohibition, intended to ensure undivided loyalty to Australia by its parliamentarians. The Court found that for some respondents, their foreign citizenship at the time of nomination or election rendered them incapable of sitting in Parliament. However, for others, the Court determined that they had taken all reasonable steps to renounce their foreign citizenship prior to nomination or election, or that they were not, in fact, subjects or citizens of a foreign power in a manner that engaged the constitutional provision. The Court distinguished between being a citizen and taking steps to renounce that citizenship, and considered the practicalities of renunciation for individuals in various circumstances.

Ultimately, the Court made declarations regarding the eligibility of each parliamentarian. For Senator Canavan, Senator Joyce, Senator Nash, and Senator Roberts, the Court declared that they were not incapable of being chosen or of sitting as a senator or member of the House of Representatives. Conversely, the Court declared that Senator Ludlam and Senator Waters were incapable of being chosen or of sitting as a senator or member of the House of Representatives. Senator Xenophon was found not to have been incapable of being chosen or of sitting.