(a) The secretary may assign or reassign dates for the expiration of licenses for any weighmaster.
(b) The secretary may establish a license year for any weighmaster consisting of any period from one month to 11 months, inclusive, with subsequent renewals being required at yearly intervals thereafter.
(c) Whenever the license year is less than 12 months by reason of the assignment or reassignment of the expiration date by the secretary, the license fee as designated in Section 12704 shall be decreased by one-twelfth of the annual fee for each month of the period less than 12 months.