Cal. Gov. Code § 8951

Nothing in this chapter shall preclude any person from instituting a prosecution for violation of any provision of Article 2 (commencing with Section 8920) unless that person has filed a complaint with the committee concerning the violation, in which case that person may not file a complaint with the district attorney of the appropriate county to institute a criminal prosecution for the violation until the committee has made its determination of the matter or a period of 120 days has elapsed since the filing of the complaint with the committee.