although not a full self-government, the gwich'in tribal council has authority over planning and conservation within its jurisdiction, and exercises full ownership of various lands and organizations. these holdings include subsurface rights to certain parcels in the nwt, as well as the gwich'in development corporation and gwich'in settlement corporation. an additional yukon transboundary agreement extends some of these rights into a part of neighbouring yukon, provided that other first nations in that jurisdiction are co-operated with.