The Montana Exceptions and Civil Authority Over Non-Members
Under Montana v. United States, the inherent sovereign powers of a tribe do not extend to the activities of non-members. A tribe may regulate non-members who enter consensual relationships with the tribe or its members through commercial dealing, contracts, leases or other arrangements, and may regulate conduct that threatens or directly affects the political integrity, economic security, or health or welfare of the tribe. Both exceptions require a nexus to the regulation asserted.










