I imagine the people on that reservation would hotly contest any unwanted structure, and would be well within their rights to dismantle said structure at anytime, even after they were forcefully subjected to it... I would gladly help them take it down.
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"What does Tribal Sovereignty mean to Indian Tribes?
When Indian Tribes first encountered Europeans, the Europeans dealt with the Tribes as sovereign governments with whom treaties were made. When Tribal lands were conveyed to the United States, the Tribes retained some inherent sovereignty over their lands. While such sovereignty is limited today, it is protected by Tribes against encroachments by other sovereign entities such as states and the Federal government."
(snip)
http://web.em.doe.gov/public/tribal/faq.html______________
SOVEREIGNTY
A Brief History in the Context of U.S. "Indian law"
by Peter d'Errico
Legal Studies Department
University of Massachusetts, Amherst USA
(snip)
"The concept of sovereignty, however convoluted and contradictory, remains an important part of federal Indian law. Tribal councils established under the Indian Reorganization Act are regarded as vehicles of "tribal sovereignty"; they act as governments and not just as corporations, though they are often limited by federal funding and authority. Indian hunting and fishing rights have been protected against state and local regulation, though an ultimate authority has been reserved outside the realm of tribal sovereignty. Indian nations are regarded as immune from suit without their consent, under the doctrine of "sovereign immunity," yet their power over non-members of the particular nation is sometimes severely limited.
In short, the idea that indigenous nations have at their roots some aspect of their original, pre-colonial status as independent nations operates -- sometimes directly and sometimes by implication -- throughout federal Indian law today. This idea is accompanied by the colonial legacy of superior authority claimed over indigenous nations by the federal government. Both these ideas have been part of federal Indian law from its inception, and are the reason why Chief Justice Marshall could say, in formulating the foundations of this law in the Cherokee Nation case, "The condition of the Indians in relation to the United States is perhaps unlike that of any other two people in existence."
In assessing the results of "tribal sovereignty" at the close of the 20th century, Vine Deloria, Jr., and Clifford Lytle wrote, "Local institutions that served Indians were in a much stronger position even though they now resembled the local units of government that served other Americans and possessed little that was distinctly Indian. Indians themselves had assimilated to a significant degree...." This may be the ultimate irony, that "tribal sovereignty" could prove to be the vehicle for incorporating indigenous nations within the colonizers' civilization. It may also be true that the persistence of "tribal sovereignty" has kept alive the idea of local sovereignty, of "the people" as the ultimate source of legal authority.
The idea of indigenous sovereignty surfaced internationally and with intensity in the Draft United Nations Declaration on the Rights of Indigenous Peoples, E/CN.4/Sub. 2/1994/56, issued in 1994 as a report to the U.N. Commission on Human Rights. This document, which may eventually become the basis for an international protocol or convention, stirred up the ancient debates. The United States took an official position that the word "peoples" was inappropriate in a statement of "rights," because it implied group rights, which would threaten the sovereignty of states. The United States and others argued that "rights" adhere only to individuals, and that no group may be recognized as having any legal existence independent of a state. Indigenous nations, on the other hand, asserted that the Draft Declaration was meant to embody just such group rights, that these were essential for the survival of indigenous peoples worldwide. Struggles about indigenous sovereignty continue into the 21st century, on as grand a scale as in any other era."
http://www.umass.edu/legal/derrico/sovereignty.html