Here is the order in Sipp v. Buffalo Thunder Inc.:
36924 and 38636 Certification Order (FINAL)
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.