California Code, Health and Safety Code - HSC § 25198.7

(a) The cooperative agreement shall provide that the state or tribe may bring an appropriate civil action in a court of competent jurisdiction to enforce the terms of the cooperative agreement as a contract, and shall not limit the availability to either party of any remedy at law or in equity otherwise available under California law.

(b) The cooperative agreement shall require that the tribe waive its sovereign immunity from any action brought by the state in any court otherwise having jurisdiction over the subject matter, and that the state shall waive its sovereign immunity from any action brought by the tribe, in any court otherwise having jurisdiction over the subject matter, to enforce the terms of the cooperative agreement.