Cal. Bus. & Prof. Code § 9887.1
The director shall have the authority to issue licenses for official lamp and brake adjusting stations and shall license lamp and brake adjusters. The licenses shall be issued in accordance with this chapter and regulations adopted by the director pursuant thereto. The director shall establish by regulation the terms of adjusters' licenses as are necessary for the practical administration of the provisions relating to adjusters, but those terms shall not be for less than one nor more than four years. Licenses may be renewed upon application and payment of the renewal fees if the application for renewal is made within the 30-day period prior to the date of expiration. Persons whose licenses have expired shall immediately cease the activity requiring a license, but the director shall accept applications for renewal during the 30-day period following the date of expiration if they are accompanied by a new license fee. In no case shall a license be renewed where the application is received more than 30 days after the date of expiration.
Ca. Bus. and Prof'l. Code § 9887.1