Background & Facts
The Hopland Band is a federally recognized Pomo tribe whose reservation lies in Mendocino County — the same county that encompasses the Mendocino Indian Reservation that ATN asserts. The dispute concerned California's attempt to extend regulatory authority onto trust land using P.L. 280 as the asserted hook.
The Tribe argued that under Bryan and Cabazon, P.L. 280 confers no regulatory authority — only adjudicatory authority over private civil disputes — and that the state's claimed authority was preempted under the Bracker balancing test.
The Court's Holding
The Ninth Circuit reaffirmed the Bryan/Cabazon distinction: California cannot use P.L. 280 as a basis for regulatory or taxing authority over tribal land, tribal members, or on-reservation tribal economic activity. Where the state's interest is asserted on trust land, the Bracker balance favors tribal sovereignty.
Key Holding:
P.L. 280 in California is strictly adjudicatory. State and county regulatory schemes — including land use, environmental, business licensing, and taxing — cannot be enforced on Pomo trust land in Mendocino County under P.L. 280.
How This Supports ATN's PL280 Arguments
This is the most directly applicable case in the entire database for ATN. Same county. Same federal circuit. Same state. Same statutory framework. Same arguments. The Hopland decision is a Ninth Circuit affirmation, in Mendocino County itself, that California cannot extend regulatory authority onto tribal trust land via P.L. 280.
- 1. Direct geographic precedent: Same county. Binding 9th Circuit law.
- 2. Mendocino County estoppel: The County has already lost this fight against another Pomo tribe.
- 3. Cannabis regulation: Direct support for ATN's position that county and state cannabis enforcement cannot reach trust land.
- 4. Land use / zoning: County zoning cannot be applied to the Mendocino Indian Reservation under PL280.
Related Cases
- Bryan v. Itasca County (1976) — The foundational PL280 limit case
- California v. Cabazon (1987) — California-specific extension of Bryan
- White Mountain Apache v. Bracker (1980) — Preemption balancing test
- Los Coyotes v. Jewell (9th Cir. 2013) — Companion 9th Cir. California PL280 case