I would say it's already built into CEPA. Everybody understands that with a substance that is persistent, bioaccumulative, and inherently toxic, the way it's distributed—let's assume that it's via air emissions, not water.... Given the way the global atmosphere works, we know that those emissions concentrate in the north, and we've seen all the studies that say that.
I can tell you—and I know your CEPA experts were here yesterday—that the Government of Canada and CEPA put a special emphasis on those substances that are PBiT: persistent, bioaccumulative, and inherently toxic. The act already does what you're saying, without having that screen of indigenous health in the north.
We put such attention on these substances because that's where we know the fates of them are: they get to the north, they end up in people on indigenous diets, and it's a problem. That's why the fullest suite of powers in CEPA can be applied to substances that are PBiT.