I am curious and unsure what is being said here. Is this person saying that there are two “Blackfeet nations in Montana? If so, they are incorrect. There is one Blackfeet Confederation in Montana with the tribal Offices in Browning, Montana.
At the time of first contact the HBC called everyone living in the Niitsitapiskaku (Blackfeet/Blackfoot Territory) Niitsitapi. The Niitsitapi are Ahpikuni (Peigan), Southern Ahpikuni (Montana Blackfeet), Ahkainah (Bloods) and Siksika (Blackfoot).
Today the Confederation is comprised of 4 groups, Pikuni (Peigan), Northern Pikuni (Northern Peigan) Kainai (Bloods) and Siksika (Blackfeet) –
Also, I have studied quite a bit of tribal law, and first and formost it is not universal. Choctaw statues are not the same as Blackfeet/Blackfoot or Dine’. Every nation sets (within certain limits) their own laws. For many nations enrolment information is public access. I do not know what the rules are for the Blackfeet, but I do know the tribal attorney and can find out rather quickly if anyone is interested. I have worked with Red Crow College in Canada, it is one of the only non-US tribal colleges, and know the woman there who is one of the cultural teachers, and also is a granddaughter (they don’t usually use the great-great add-on) of Red Crow. Perhaps she will be able to clear this up and verify Tamara credentials.