Canberra, Jul 28 (AP) Another senator’s right to sit in the Australian Parliament was under a cloud today over a constitutional prohibition on dual citizens being lawmakers that has already ousted two senators in two weeks and threatens a third.

Sen Malcolm Roberts, born in India in 1955 to an Australian mother and Welsh father, revealed yesterday he only received written confirmation that he was not a British citizen five months after he was elected in July last year as a representative of the anti-immigration, anti-Muslim One Nation party.

If Roberts were a dual citizen when he was elected, High Court precedent suggests he was ineligible to stand. He could be forced repay his salary and be fined for each day he spent as a senator.

A spate of recent political casualties of a contentious section of the constitution has frightened political parties and threatens to alter the balance of the disparate senate where no party holds a majority.

Roberts moved to Australia as a child and said never believed he was anything but Australian. But Roberts said he repeatedly asked the British government for confirmation that he was not a dual citizen before he nominated for election.

Roberts has refused to release the documents confirming he was not a British citizen, which he said he received in December.

But he said he had legal advice that he would survive any court challenge to his eligibility.

“I’ve taken all steps that I reasonably believe necessary,” Roberts told Sky News television.

The High Court has ruled that dual citizens can run for Parliament if they have taken all reasonable steps to renounce the second nationality. This applies to cases involving countries that don’t allow their nationals to renounce their citizenship.

The focus was shone on lawmakers’ eligibility when a lawyer decided to investigate whether two New Zealand-born senators elected a year ago had renounced their New Zealand citizenship.

One of them, Greens party co-deputy leader, Scott Ludlam, had not. He resigned on July 14.

Four days later, the Greens’ other co-deputy leader, Larissa Waters, resigned after discovering she was a citizen of her birth country, Canada.

Australian-born government senator Matt Canavan resigned from Cabinet this week but has decided to fight to stay in Parliament after discovering he is Italian.

Canavan said his Australian-born mother, who had Italian parents, had signed her son up to become Italian when she applied to an Italian consulate for citizenship in 2006.

Canavan said he had not been aware that an application for dual citizenship had been made on his behalf.

The High Court will rule on whether he is eligible to remain in the Senate, and perhaps clarify the rules around citizenship.

Senior government Minister Chris Pyne said today the idea that Canavan could be made a citizen of another country without his knowledge and without signing any application as a 25-year-old “is quite frankly entering the theatre of the absurd.”

“On that basis, (President) Kim Jong Un could make us all citizens of North Korea and we’d all have to resign,” Pyne told Nine Network television.

The Greens have called for an independent audit of all 226 federal lawmakers to ensure that they were all lawfully elected. (AP)

This is published unedited from the PTI feed.