Yes, provinces do set their requirements. At the same time, at the federal level, the Minister of Immigration recently implemented regulatory amendments that set federal requirements as well. One of those requirements is that employers of temporary foreign workers abide by all provincial or territorial public health laws related to COVID-19, so that's one piece in particular.
The regulations also have requirements for employers who provide accommodations to workers. For example, the workers who are in quarantine have to be housed separately from those who are not. In addition, any worker who gets sick or exhibits signs or symptoms of COVID-19 at any time must be isolated from other workers. Those are some of the other ones.