California Code, Revenue and Taxation Code - RTC § 8704

Whenever any user fails to comply with any provision of this part or any rule or regulation of the board prescribed and adopted under this part, the board upon hearing, after giving the user at least 10 days' notice in writing specifying the time and place of hearing and requiring him to show cause why his permit should not be revoked, may revoke the permit held by him. The notice may be served personally or by mail in the manner prescribed for service of notice of a deficiency determination.