California Code, Code of Civil Procedure - CCP § 760.020

(a) An action may be brought under this chapter to establish title against adverse claims to real or personal property or any interest therein.

(b) An action may be brought under this chapter by parties to an agreement entered into pursuant to Section 6307 or 6357 of the Public Resources Code to confirm the validity of the agreement.

(c) Nothing in this section shall be construed to limit the right of members of the public to bring or participate in actions challenging the validity of agreements entered into pursuant to Section 6307 or 6357 of the Public Resources Code.