Councillors had previously asked Mr Guerin if the remission policy was legal and if the council needed to consult the community again about what Mr Sturt called a significant departure from the council's Long Term Plan.
Mr Sturt said he was uncomfortable with Mr Guerin's decision to hold back legal advice, but after repeated requests he was pleased to hear he now had access to that information.
"The [remission] policy was not consulted on and is unfair on the rest of the community as it only benefits the business sector."
He said he believed the policy was illegal under the Local Government Act because it had not been publicly consulted on earlier this year and constituted a major change to the Long Term Plan, which was approved by the council on June 29.
Mr Guerin told councillors at Tuesday's meeting he would provide them with a copy of the legal advice, but in the intervening days he denied councillors' requests.
However, on Thursday afternoon he reversed his decision yet again, saying he would now give the legal advice to councillors.
"I'm not sure why he has done that; all I wanted to see was a copy of that advice, as he may have missed something," Mr Sturt said.
"I see the change in the remission policy as an amendment to the Long Term Plan [which] must go out for public consultation as per the Local Government Act. That's why I insisted on seeing a copy of the legal advice."
The Daily Post attempted to access the same information but was refused.
The council's Corporate and Customer Services group manager, Jean-Paul Gaston, said that under the Local Government Official Information and Meetings Act 1987 council officers considered the advice to be held under legal privilege and it would remain confidential.
"However, I can assure you that the council has been careful to ensure that the approach we have taken to address the concerns of local business ratepayers is appropriate under council's existing policies and has a sound legal basis."