NSW Premier Dominic Perrottet will be referred to the police by a small party who want to know whether he broke a vague law over his remarks when he joined the Liberal Party in the wake of the Nazi costume controversy.
On Sunday, Perrottet sought to put an end to the controversy and again apologized for his actions after admitting on Thursday that he wore a Nazi costume to his 21st birthday party.
But Robert Bursack, leader of the NSW Shooters, Fishers and Farmers party, says Mr Perrottet broke the oath when he signed the Liberal Party's preselection document around 2010 and declared he had nothing to say that could embarrass the party.
"He must be held accountable, he is not above the law," Bursak said in a statement on Sunday.
This also came after Mr. Perrottet said he was focused on the state, which will hold elections in March.
"I'm focused on moving the state forward... That's what I've focused my entire political life on," he said in western Sydney.
The SFF party has two senators in the state parliament, including Mr. Bursak and Mark Panasiak.
Bursack, vice-chairman of the Parliamentary Public Accounts Committee, said he would ask the committee members to hold an urgent hearing "to examine the eligibility and conduct of Mr Perrottet to remain as Premier of New South Wales".
On Sunday, Perrottet , 40, was asked if any Liberal politicians attended his 21st birthday party at his parents' home in northwest Sydney.
He said he could not remember who was there and did not want others to "drag" the case.
"It's not about others, I made a mistake, it's about what I did, what I know is that I was there," he told reporters.
Perrottet made the claim of wearing a Nazi outfit on Thursday after a phone call with Transportation Secretary David Elliott.
On Sunday, Perrottet repeated his admission that he made a mistake by wearing the costume.
“The person I am today is not the person I was then.”
“As you go through life, you don't just learn from the good things, you learn from the mistakes you make.”
A spokesperson for the prime minister referred questions about Mr Bursak's referral to the state's Liberal Party, saying it was a matter of the party.
Mr. Perrottet confirmed that he has the support of his colleagues, as many publicly support him.
Roads Minister Natalie Ward, who was with Mr Perrottet to announce a new billion-dollar road package in western Sydney, said the prime minister was aware of the error and that the error was not a reflection of the man she had worked with.
“What I saw in Perrottet is a caring, kind person who does the best he can every day for the people of New South Wales,” said Mrs. Ward.
Labor leader Chris Minns did not demand the prime minister's resignation.
"It is not within my competence to excuse him or accept his apology on behalf of the government," he said on Saturday.