Within 60 to 90 days prior to the expiration of a certificate of registration or certificate of authority, the board shall mail to the registrant or authority holder a notice of the pending expiration. That notice shall include application forms for renewal. If there is no response by the expiration date, the board shall provide a second notice to the registrant’s or authority holder’s address.
Source:
Section 6795.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=6795.1..