system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Is a Native American reservation a sovereign nation? How do a reservation's laws interact with US Federal law?
gpt
Indian reservations are not sovereign nations, which we can see from the fact that they do not belong to (and have not been invited to join) the United Nations, they do not require passports for anyone entering or leaving the reservation and do not levy tariffs on goods entering or leaving the reservation; the laws of the United States can be enforced within the reservation, and the ultimate authority which governs reservations is the Bureau of Indian Affairs, which is part of the federal government.  That said, they have some degree of local autonomy, and even if they are not sovereign nations, they preserve the traditions of sovereign nations which used to exist prior to the conquest of North American by European settlers.