We have just a couple of points.
The first is that Canada adopted a specific regional negotiation policy here in the NWT after the 1990 failed Dene-Métis agreement. That regional policy worked better in the northern Mackenzie Valley. It's not working in the southern Mackenzie Valley because there are a multitude of different indigenous groups using the same area. You can't have, as Bill said, hermetically sealed regions anymore.
The policy has to evolve from being geographically based to being much more ethnically based or much more about identifying the different indigenous users and conceiving of claims that are specific to them and settlements that are specific to those groups of users, rather than specific to a region generally.
On how you would deal with the certainty or the non-derogation clauses, because they go hand in glove, you would tailor those clauses not to the region but to the specific users who are voluntarily enrolling with that under that agreement. They're the ones who would decide if that's acceptable to them and to codify their aboriginal rights under the agreement.