2026 Membership Book FINAL

USCA4 Appeal: 25-1892

Doc: 44

Filed: 12/22/2025

Pg: 13 of 39

TASIN is an intergovernmental association of federally recognized tribal governments throughout Southern California that protects and promotes tribal sovereign government rights and the cultural identity and interests of its member tribes. The Amici Tribes are 30 federally recognized Indian tribes, as defined by IGRA. 25 U.S.C. § 2703(5). Each of the Amici Tribes is a separate and distinct tribal government with the sovereign authority to conduct and regulate gaming activities on its Indian lands. Together, the Tribal Amici share a strong interest in this case because of its potential to significantly impact their or their member tribes’ sovereign rights regarding gaming on Indian lands and tribal governmental revenue as a whole. Tribal gaming revenue provides vital funding for essential government services, tribal programs, and economic development needed to reach the goals of self- governance and self-sufficiency. STATEMENT Indian tribes have primary jurisdiction over their lands and activities occurring thereon. Tribes, like states, have a strong sovereign interest in determining what gaming activities may take place on their land. See 25 U.S.C. § 2701(5); cf. WV Ass’n of Club Owners & Fraternal Servs., Inc. v. Musgrave , 553 F.3d 292, 302 (4th Cir. 2009) (“[R]egulating gambling is at the core of the state’s

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