County boards of supervisors may set fees for registration to cover the cost of registering pest control advisers, but in no case shall the fee total more than ten dollars ($10) per year for a pest control adviser to register in person in the county listed in the adviser’s address on the license issued pursuant to Article 2 (commencing with Section 12021) or the county of occupational choice, as the case may be, and five dollars ($5) per year for an adviser to register in an additional county as provided in Section 12031.