They exist throughout the territory, but they are certainly a creation of the land claim settlement process. The MVRMA, the Mackenzie Valley Resource Management Act and also the legislation that applies in the Inuvialuit region are directly the result of settlement of land claims.
As in the case of the Yukon, where even if there are some first nations that have not settled their claims or moved to self-government, there is a co-management regime that applies for the whole territory.