About 1000 people are outside the Beehive today, protesting against a range of the government's Covid-19 measures.
It is the eighth day of the occupation, which has been inspired by a similar movements overseas.
Nearly 200 hundred parking tickets were handed out to the protesters at Parliament, with wardens out this afternoon ticketing vehicles blocking roads and illegally parked near the protest.
But only one of the 180 issued before today has actually been paid.
While protesters have been given free parking at nearby Sky Stadium in a bid to clear the streets, only a few dozen have moved there.
In a statement, Police Commissioner Andrew Coster said it acknowledged the right to lawfully protest, but the effect of this protest around the Parliament grounds, on roads, residents, schools and businesses, was "no longer tenable".
"Having followed international developments, police considers it unwise to escalate tensions, and we have offered alternatives that would enable the roads to be cleared.
"However, protesters have not taken up the offer and nor have they shown any concern for the negative impact of their activities.
"Police will continue to give protesters the opportunity to remove their vehicles voluntarily, but time is fast running out for this to happen."
Coster warned that if roads were not cleared then vehicles blocking the way would be towed, which would be seized and not immediately released.
Anyone who obstructed police efforts to clear the roads could be arrested and charged, he said.
"We continue to encourage protesters to do the right thing and facilitate opening of roads in the area.
"It is possible for this protest to be conducted lawfully but the current manner of protest is both unreasonable and unfairly impacting others."
Coster said police had an ongoing willingness "to work in good faith", but it was clear from international experience that that was "no easy resolution to protests of this nature".
"The safety of the public and consequences of escalation are a significant factor in our decision making."
The MOC will manage and coordinate resourcing, response options, logistics, and health and safety, with Assistant Commissioner Richard Chambers appointed as national controller of the operation.