The position in the Labour Party of the Lord Mayor of Dublin, Cllr Dermot Lacey, will be discussed by his party colleagues at a meeting on Monday.
Mr Lacey faces possible expulsion from the party for voting in favour of an increase in bin charges.
He will not, however, be subjected to any disciplinary action until the stand-off over the city manager's book of estimates has been resolved.
Cllr Tommy Broughan, who heads the Labour group on Dublin City Council, said last night that Mr Lacey had effectively lost the party whip by voting for the 30 per cent increase in bin charges.
He said the move was in direct defiance of Labour policy.
He added that the matter was likely to be brought up at a scheduled meeting of Labour councillors on Monday, prior to the main meeting of Dublin City Council.
Mr Broughan said he was still hopeful Mr Lacey would vote with the party on the issue in the future.
"I am confident that another date will be set by the Department of Environment for a vote on the estimates, and I hope Cllr Lacey stands with the party in rejecting the charges on that occasion," he said.
However, Mr Lacey insisted yesterday that if the chance to vote again arose he expected to vote the same way because "it is the right thing to do".
"I believe if the book of estimates is not passed then Minister Cullen will abolish the council and appoint a commissioner to oversee the council, who may introduce higher bin charges this year and increase it next year."
Mr Lacey added: "Voting for the charges is the lesser of two evils."
Mr Cullen is still awaiting a response from the city manager, Mr John Fitzgerald, as to whether the book of estimates may be passed if the time allowed to agree a budget is extended.
A spokesman for Mr Pat Rabbitte TD said the Labour leader had no comment to make on the issue as it was "council business".
The annual bin charges are currently €121 and are set to rise to €156 under council management proposals contained in the council budget.
A waiver scheme is proposed for those who plead inability to pay.
The charge is around €40 million of the total €700 million expenditure for the coming year.
The Fianna Fáil group, which has 21 members, is known to accept the charge, as does the Green Party and Fine Gael.
Sinn Féin and the three independents are opposed.
Mr Lacey is the only member of the 13-strong group of Labour councillors to vote in favour of the charges.