Perhaps it wouldn't threaten the law necessarily, but it would create a different law for Canadian mining companies operating there, like a law that's more conducive to their interests. Both would exist. The national law would exist for national mining players, and then international mining players, like Canada, if there's a treaty, would get these extra super-laws that tend to treat countries quite favourably in disputes as they come up.
On May 9th, 2022. See this statement in context.