The council refused to release the Terms of Reference under the Local Government Official Information and Meetings Act, citing the need to protect staff and councillors from "improper pressure or harassment".
It also said they were being withheld in order to "maintain the privacy of natural persons" and legal privilege.
It also refused to release the cost of the review.
But the leaked document said the purpose of the review was to determine "what action the council staff took in relation to councillors' Facebook posts and why; and whether the four councillors were notified about the LGOIMA request that included reference to their Facebook posts."
That LGOIMA request was initially made by RNZ after previous documents obtained under the Act showed council staff had compiled a dossier of Facebook posts belonging councillor Kirsten Wise.
Further LGOIMA requests revealed four councillors' posts had been monitored, and emails between staff showed them discussing whether Code of Conduct breaches could be brought against them in relation to some of their posts.
The review was expected to be completed by October 21.
Once finished the council would determine whether any additional steps or processes may be taken if a similar situation occurred again.
"This is not an investigation or a review pursuant to the Code of Conduct for Elected Members. Nor is it an employment process in relation to the Chief Executive or Council staff.
"However, the findings of the review may be relied on by Elected Members if they determine any further steps or action is appropriate," the Terms of Reference said.
A draft report was prepared by Peter Chemis and provided to the council earlier this week and a final report was expected to be provided on Monday.
All councillors had input and agreed to the Terms of Reference last month.
The council said it was "too early to make any statement in relation to costs as these will be dictated by the review process which has yet to be completed."
- RNZ
