California Code, Business and Professions Code - BPC § 1301.1

Notwithstanding any other provision of this chapter, the department may establish such license periods and renewal dates for all licenses issued under this chapter in a manner as to best distribute the license renewal process throughout a given year, or longer period, if necessary, to permit the most efficient and economical use of the department's personnel and equipment.  To the extent practical, provision shall be made for the proration or other fee adjustments in a manner that no licensee shall be required to pay a greater or lesser fee than he or she would have been required to pay if the change in license periods or renewal dates had not occurred.