Cal. Gov. Code § 11503

A hearing to determine whether a right, authority, license or privilege should be revoked, suspended, limited or conditioned shall be initiated by filing an accusation. The accusation shall be a written statement of charges which shall set forth in ordinary and concise language the acts or omissions with which the respondent is charged, to the end that the respondent will be able to prepare his defense. It shall specify the statutes and rules which the respondent is alleged to have violated, but shall not consist merely of charges phrased in the language of such statutes and rules. The accusation shall be verified unless made by a public officer acting in his official capacity or by an employee of the agency before which the proceeding is to be held. The verification may be on information and belief.