Malcolm Turnbull is escorted through the West Bank by Palestinian Prime Minister Rami Hamdallah on Wednesday. Turnbull said he doesn't support a citizenship audit. Credit:AAP "He chose to delay his reporting of it. He should have reported it much earlier and it could have been referred to the High Court together with the other citizenship by descent cases." The Tasmanian announced he would resign after revealing that he, too, was ineligible under the Constitution, because his father was born in the UK. After getting advice from the British Home Office, he announced on Thursday he would stand down – less than a week after the High Court kicked five politicians out of parliament over their citizenship status. On Wednesday, Barnaby Joyce – himself facing a byelection after being shown to have been invalidly elected – predicted there would be more Labor and Liberal MPs to come forward, who were " all playing this dopey little game where they were waiting for the Nats to take the rap, and then sneak in behind and say, 'Well we don't have to do that'."

Malcolm Turnbull visits at the Yad Vashem Holocaust Memorial in Jerusalem on Wednesday. Credit:AP Mr Turnbull said each member of parliament and each senator had a personal responsibility and obligation to comply with the constitution, and to take steps to confirm their citizenship status if they suspected they might fall foul of the law. "The obligation is a personal one," Mr Turnbull said. "When you run [for office] you tick a box on the form … everyone should ensure they are in compliance and if they are not they should say so, and if there is a question of doubt it can be referred ot the High Court. Malcolm Turnbull, pictured at the Yad Vashem Holocaust Museum in Jerusalem, said Australia supported a two-state solution but would not be drawing the line for a boundary. Credit:AP "I expect every member and senator to take their obligation very seriously and if they feel they are not in compliance with the constitution [to] say so."

Liberal MP Craig Kelly broke ranks on Tuesday and called for a "full audit" of MPs' citizenship status. He was soon joined by a handful of colleagues. Mr Turnbull rejected the idea of a formal audit, saying it might "mean that somebody is going to undertake extensive geneological research on every MP and senator, and undertake research into foreign laws". He said Mr Parry's case would be referred to the High Court to confirm he was disqualified from Parliament, so it was clear what the next step should be. And he said the issue of whether Mr Parry might have to return some of his salary was a matter for the Finance Minister, and there were precedents for how to deal with the question. Mr Turnbull said his visit to Yad Vashem had been "one of the most moving experiences that anyone can have," leaving him shocked about the banality of evil.

"It reminds us that the smartest, the most technological, the most educated can do the most terrible things," he said. On leaving the museum he left a note in a visitors' book saying: "All of the world's oceans cannot contain our tears and all of the world's steel cannot match the strength of our determination to stand with Israel and the Jewish people and resolve 'never again'." Mr Turnbull said Australia supported a two-state solution in Israel, and he had discussed the peace process and the subject of Israeli settlements in the West Bank with Prime Minister Benjamin Netanyahu on Monday. But he said it was not for Australia to "draw the line" for the boundary between Israel and Palestine. Asked if he believed the West Bank was occupied, he sighed and said he had a very productive discussion with Mr Netanyahu and looked forward to a meeting on Wednesday with Palestine Prime Minister Rami Hamdallah where he would discuss these issues.