I can't see how they would use the federal law as an interprovincial trade barrier. They might conceivably use their own standards. They govern their own markets, so if they wanted to restrict access to their markets, and they had a firm that produced highly efficient products, it would be within their domain to execute the desire through that legislation. Presumably, they would then enter into a discussion about interprovincial barriers.
I think it would be quite separate, then, from what the federal legislation might bring up.