Last night in the senate, Nationals deputy leader Fiona Nash revealed she was a dual British-Australian citizen because of her Scottish-born father. That's right: "Any Australian citizen is entitled to live, study and work there", he said.
Like Joyce, Nash has referred the case to the High Court for qualification.
Senator Nash said she had spoken with Prime Minister Malcolm Turnbull a short time ago and the Federal Government had sought advice from the solicitor-general.
Mr Hipkins' involvement led Australian Foreign Minister Julie Bishop to say she would have a problem trusting a Labour-led government. Nash, who was born in Sydney in 1965, said that her father was born in Scotland in 1927 and she had little contact with him after her parents divorced when she was aged eight.
Neither Senator Nash nor Mr Joyce resigned their cabinet or party positions, with the Turnbull government referring both to the High Court.
But unlike the deputy PM, who holds a lower house seat, Nash sits in the upper house Senate.
The dual citizen MPs will get their first hearing before the High Court next Thursday. However, that case also found that "it would be wrong to interpret the constitutional provision in such a way as to disbar an Australian citizen who had taken all reasonable steps to divest himself or herself of any conflicting allegiance".
Facebook takes a harder line on video clickbait following spam complaints
Spammers often use fake video buttons to take users to low-quality websites which could even contain malware. For all the effort put into fighting the problem, clickbait is still one of the worst elements of Facebook .
Senator Nash is the sixth parliamentarian to be a dual citizen.
Apart from the Nationals, the others to appear before the court will be One Nation Senator Malcolm Roberts and two Greens senators, Scott Ludlam and Larisa Waters.
One list, published by the Australian, named 50 MPs who had at least a grandparent born overseas.
The meaning of section 44 (i) has not been read by the High Court as an absolute bar on a candidate being a foreign citizen.
This would be the second resort within 18 months to the anti-democratic powers held by the Queen's representative, after Turnbull past year asked the governor-general to prorogue the parliament to pave the way for a double dissolution election of both houses.
Three other politicians will also have their eligibility tested in court as early as next week, namely far-right Senator Malcolm Roberts, who claims he renounced his United Kingdom citizenship, Scott Ludlam, who resigned as co-deputy leader of the left-wing Greens over his New Zealand status and another Greens co-deputy leader and Canadian dual national, Larissa Waters, who has also resigned.