Here's the first page of what Mike Miller referes to as the Cherokee by Intermarriage, my 2nd great grandfather is on this list; his daughter in law my great grandmother was not even enrolled on the Dawes because the Commissioner decided they could not be.
So, the Federal Government has controlled all this for quite some time...and with 3/4 of the US population claiming Cherokee practically, the Cherokee Nation's citizenship requirements are from the Dawes Base Roll, of which this is a part.