California Code, Business and Professions Code - BPC § 142

(a) Notwithstanding any other provision of law, each bureau and program may synchronize the renewal dates of licenses granted to applicants with more than one license issued by the bureau or program. To the extent practicable, fees shall be prorated or adjusted so that no applicant shall be required to pay a greater or lesser fee than he or she would have been required to pay if the change in renewal dates had not occurred.

(b) Notwithstanding any other provision of law, the abandonment date for an application that has been returned to the applicant as incomplete shall be 12 months from the date of returning the application.

(c) Notwithstanding any other provision of law, a delinquency, penalty, or late fee shall be assessed if the renewal fee is not postmarked by the renewal expiration date.