Cal. Gov. Code § 53760.7
This article shall not impose any liability or responsibility, in law or equity, upon the state, any department, agency, or other entity of the state, or any officer or employee of the state, for any action taken by any local public entity pursuant to this article, for any violation of the provisions of this article by any local public entity, or for any failure to comply with the provisions of this article by any local public entity. No cause of action against the state, or any department, agency, entity of the state, or any officer or employee of the state acting in their official capacity may be maintained for any activity authorized by this article, or for the act of a local public entity filing under Chapter 9 of Title 11 of the United States Code, including any proceeding following a local public entity's filing.
Ca. Gov. Code § 53760.7