Cal. Pub. Res. Code § 6224.4
(a) Before the commission considers whether to pursue a remedy provided under Section 6224.3, the commission shall first provide a written notice to the person against whom the commission seeks to impose the penalty. The notice shall include an opportunity for a hearing before the commission at a properly noticed public meeting. The commission shall send the notice not less than 30 days before the date set for conducting a hearing pursuant to this section. A notice shall include all of the following: