25 CFR §83.4

1. (a)An association, organization, corporation, or entity of any character formed in recent times unless the entity has only changed form by recently incorporating or otherwise formalizing its existing politically autonomous community;
2. (b)A splinter group, political faction, community, or entity of any character that separates from the main body of a currently federally recognized Indian tribe, petitioner, or previous petitioner unless the entity can clearly demonstrate it has functioned from 1900 until the present as a politically autonomous community and meets § 83.11(f), even though some have regarded them as part of or associated in some manner with a federally recognized Indian tribe;
3. (c)An entity that is, or an entity whose members are, subject to congressional legislation terminating or forbidding the government-to-government relationship; or
4. (d)An entity that previously petitioned and was denied Federal acknowledgment under these regulations or under previous regulations in part 83 of this title (including reconstituted, splinter, spin-off, or component groups who were once part of previously denied petitioners).