Cal. Gov. Code § 64118

Any holder of bonds issued under this division or any of the coupons appertaining thereto, and the trustee or trustees under any indenture or trust agreement, except to the extent the rights herein given may be restricted by any resolution authorizing the issuance of, or any indenture or trust agreement securing, the bonds, may, either at law or in equity, by suit, action, mandamus, or other proceedings, protect and enforce any and all rights under the laws of the state or granted hereunder or under the resolution or indenture or trust agreement, and may enforce and compel the performance of all duties required by this division or by the resolution, indenture, or trust agreement to be performed by the issuer or by any officer, employee, or agent thereof.