In an email to all councillors this afternoon, council chief executive Barbara McKerrow said the review could cost up to $65,000, excluding GST.
She said that money would come from operational budgets.
McKerrow was responding to an email councillor Jill Day penned yesterday raising concerns councillors did not get to have a say in who would undertake the review.
Day argued committee delegations made clear all councillors were responsible for reviewing governance and wanted council officer advice.
McKerrow said she had consulted the council's general legal counsel.
She said the Strategy and Policy Committee, the council's decision-making engine room, had the delegation to review, develop and make recommendations to the council on policy and practices in respect of governance.
"There is, however, no stated delegation to initiate a review, so the actions of the mayor in initiating the review are not inconsistent with the committee's delegation."
Day told the Herald she disagreed with the situation but accepted it.