Montana et al. v. Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation et al.

Opinion summary

Etalia.ai summary of the majority opinion

The case involved a dispute between the State of Montana and the Northern Cheyenne Tribe regarding jurisdiction over hunting and fishing rights on lands within the boundaries of the Northern Cheyenne Indian Reservation. The central issue was whether Montana had regulatory authority over non-Indians hunting and fishing on reservation lands owned by non-Indians. The Supreme Court held that, generally, state law does not apply to activities occurring on tribal land unless Congress has expressly provided otherwise or if such regulation is necessary to prevent harm to tribal self-government or internal relations. However, for lands owned in fee simple by non-Indians within reservation boundaries, states may have some regulatory power unless it interferes with tribal sovereignty or treaty rights. This decision reinforced principles from previous cases about balancing state interests with preserving tribal autonomy.