The Auckland Council is set to put the brakes this week on Ports of Auckland expanding its operations any further into the Waitemata Harbour.
The council is expected to follow up Mayor Len Brown's call for a conversation about the future of the port with a new rule making any further reclamation in the port precinct a "non-complying" activity.
The rule would make it extremely difficult for Ports of Auckland to implement its latest plans to expand up to 179m into the harbour.
However, the rule will be reviewed once Mr Brown's conversation - a study he called for two weeks ago into the wider impacts of port expansion for the rest of the city - is concluded.
At that stage, the council will decide what, if any, changes to make in the new planning rulebook for the city, or Unitary Plan.