Here are the materials in Stand Up for California! v. Dept. of Interior (E.D. Cal.):
1. Whether, in 1994, Congress eliminated the distinction between “historic tribes” and “created tribes” and, thereby, eliminated the requirement that a tribe must have pre-existed the United States to have tribal immunity
2. Whether the JIV, which became a quarter-blood Indian group in 1996, is a federally recognized tribe, with tribal immunity, by virtue of the fact that it is still on the list of “Indian tribal entities” eligible to receive BIA services.
Lower court materials here.
Here is the order in Sipp v. Buffalo Thunder Inc.:
The question certified:
[W]hether the Indian Gaming Regulatory Act (IGRA), 25 U.S.C. §§ 2701-2721 (2018), permits tribes and states to contract in Tribal-State Class III Gaming Compacts to shift jurisdiction over certain matters to state courts.