From NITA:
Agua Caliente Band of Cahuilla Indians v. Riverside County, et al, 5:14-cv-00007-DMG-DBT (United States District Court, Central District of California). The Aqua Caliente Tribe filed this civil action against Riverside County to stop the collection of taxes on Indian land leaseholders. The Desert Water Agency intervened in this action. Riverside County collects possessory interest taxes from Indian land leaseholders and then redistributes much of the money to cities, schools and other local governments. The Tribe has long viewed as this tax as illegal and views these possessory interest taxes as an unlawful infringement on Tribal sovereignty rights. The action was filed January 2, 2014 and is set for trial on June 16, 2015.
Here are the materials in Agua Caliente Band of Cahuilla Indians v. Riverside County (C.D. Cal.):
NITA_Request_to_File_Amicus_and_Brief
Opposition_to_File_Amicus_Desert_Water
Turtle Talk 