A reference question seeking to compare the current Standing Rock Constitution, which has amendments through 2008, yielded three copies in the archive of a 1963 published edition of the Standing Rock Constitution, with amendments since it was put into effect by tribal council on April 24, 1959. You can read a copy of each at the links above and compare.
The library lacks an original published copy of the 1959 Constitution. It would have been published in 1959 or shortly after. If you have a copy, or know where one can be found, we would be very happy to get one or a digital copy.