California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 29031

The assessment fees shall be payable to the director on July 1 of each year. The director shall send a written notice of the nonpayment of the required assessment fee to any person who fails to pay the assessment fee on that date. If the total amount of the assessment fee is not paid within 31 days after receipt of the written notice from the director, the person shall be required to pay, in addition to his or her regular fee, a penalty fee equal to 10 percent of the amount of the assessment fee prescribed pursuant to Section 29030, plus interest from that date. The interest shall accrue on a daily basis until the amount owed is paid.