Cal. Food & Agric. Code § 32811

Any license or permit that is issued pursuant to this division, may be suspended or revoked by the director, after a hearing before the director if, within 30 days after written notice, the licensee or permittee fails to comply with the laws and regulations under which the license or permit was granted, fails or refuses to complete a drug residue prevention program, or has been found to have produced milk in violation of the drug residue provisions of this chapter on three or more occasions within a 12-month period. The licensee or permittee shall have written notice of the time and place of the hearing and the charges that are made against him or her.