The Cannabis Party are defending Wicked Camper's right to freedom of speech, relating to cannabis references, following an "offensive ruling" by the chief censor.
The censor's ruling has been labeled as an offensive publication by the Cannabis Party leader Julian Crawford, who has referred the ruling to the censor.
The censor banned images on vans depicting cartoon characters Scooby Doo and Dr Seuss with cannabis references.
The offensive slogans are "someone pass Shaggy the baggie so he can roll Scooby a doobie" and "I did a bong I did, I did a bong! A bong I did".
"The censor will now have to publicly justify why he is perpetuating offensive and derogatory attitudes towards cannabis users," Mr Crawford said.
"The censor has effectively said that violence, rape and murder is more acceptable to society than cannabis, with this ruling."
When freedom of speech is under attack the Cannabis Party has a moral obligation to fight back.