Well, it would have to be pursuant to some type of lawful production order. In a regulatory statute, you could have some kind of a production order in the same way that workplace safety and health officers would have access to certain types of information. But there would have to be lawful access authority in that type of a provincial statute.
I would think that if the material were in a private dwelling, a provincial lawful access provision wouldn't be sufficient. It would have to still be some type of a warrant to allow access into a dwelling.