Colbeck made the comments to The Age, saying the 49-year-old can apply for an exemption like Djokovic did. But, he insisted no preferential treatment would be given to Slater just because he's a surf legend, and he could end up facing a similar fate as Djokovic if he goes down that path.
"I reckon he knows the rules. It doesn't matter whether you're a surfer, or a tennis player, a tourist or anyone else, those are the rules. They apply to everyone," Colbeck said.
"I don't like the chances of him competing in Victoria, and I'd hate to think of what the chances were of him competing in Western Australia."
The World Surf League has two big events in Australia slated for April.
Slater, meanwhile, ripped the Djokovic Australia COVID vaccine saga earlier this month on social media ... writing "Maybe Stockholm Syndrome can now change its name to Melbourne/Australia Syndrome."
"It's sad to see the celebrated division by the 'virtuous' vaccinated," Slater added. "If you're vaccinated why are you concerned/worried about anyone else's status...unless, of course, it doesn't protect you?"
As for the WSL, it has not made COVID vaccines mandatory ... though it has strongly encouraged surfers to get the shots.