A council byelection triggered by Labour candidate Willow-Jean Prime winning a seat in Parliament via the party list is expected to take place before Christmas.
Mrs Prime, a second-term Far North District councillor, placed third in the race for the Northland electorate with 7219 votes but her high place on Labour's party list - number 17 - means she has a seat in Parliament.
The byelection - which will be by postal ballot - is expected to cost about $45,000.
Earlier she told the Advocate she intended to inform the council of her intention to resign as early as yesterday if the results for the Northland electorate were clear-cut.
The timing of the byelection is strictly controlled by the Local Electoral Act, which states it has to take place within 89 days of the council's electoral officer being informed of an "extraordinary vacancy", unless that would cause the byelection to fall in the Christmas-New Year period. In that case the byelection will start towards the end of January.