The City of Newcastle has banned the climate group Rising Tide from protesting on community land.
Rising Tide was planning to hold a blockade at the world's largest coal export port in early 2027.
Activists are concerned the ban will affect other protest groups.
A NSW council has banned a climate action group from protesting on community land "now and into the future", sparking fears among activists about their right to peacefully protest.
Newcastle's Lord Mayor Gavin Morris used his casting vote on Tuesday to pass a motion opposing the use of "community-owned land for the purpose of Rising Tide's events/protests".
Those events include The People's Blockade of Newcastle Harbour, which was planned for February next year.
Previously, the City of Newcastle council had allowed Rising Tide to stage its event at Camp Shortland, adjacent to the harbour.
Cr Morris told ABC Newcastle Breakfast that safety concerns raised over previous Rising Tide events were the catalyst for his decision.
"The constant request for them [Rising Tide activists] to remain within the boundaries has been broken, and it's been a constant breaking of promises," he said.
"Sadly, they keep pushing the boundaries beyond the realms of safety and something just needed to be done."
The council motion also noted the ban would apply to groups associated with Rising Tide.
