They will be independent contractors.
Some who work in managed brothels—if they were to take it to court and to challenge it—will be able to convince either the employment standards branch or the court that there's so much control over the work that they've done that they are actually employees. But they would have to enforce that themselves. There would be no government body that would say that.
In fact it would be one of the few unregulated businesses in Canada. If you were to decide to do nothing or allowed to decriminalize it, it would be completely unregulated. There are no occupational health and safety provisions there.
Also in respect to human rights laws, it will have knock-on effects on all women. Because if you're telling society or telling women that it's no longer unlawful to impose a condition of employment to have sex as part of your employment—which is what it is—then that will have a knock-on effect against all women in employment when that kind of consideration becomes lawful.