The organiser of this weekend's One Love festival in Tauranga has turned down a cannabis petitioner's request to set up a marquee at the event.
Thousands of concert-goers are expected to attend the reggae festival at Tauranga Domain.
David Tank asked festival promoter Pato Alvarez if he and fellow campaigners could set up and collect signatures at the event.
However, Alvarez said he did not want to politicise the event.
"He is more than welcome to buy a ticket just like anyone is welcome to come to the festival. But if he is going to do something he is not allowed to then he will be asked to leave."