Each indian reservation in the U.S. has its own constitution, bill of rights, and by-laws but they cannot take away from those of the nation. Typically that is the first item as in the below choctaw constitution:

http://www.narf.org/nill/Constitutions/choctawconst/choctawconst.htm#a4


ARTICLE IV - BILL OF RIGHTS

Section 1. Nothing in this Constitution shall be interpreted in a way which would diminish the rights and privileges that tribal members have as citizens of this Nation, the State of Oklahoma, the United States of America or under any Act of the Congress of the United States.



>>I'll try < s >.
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>Nice Try :)
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>Now I get the idea. I was having a very different interpretation, as you might see in my reply to Alex.
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>>The majority of these people were put on what we call "reservations"
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>The same happens in Brazil (mostly in the center-west and north).
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>Thanks!