Cal. Food & Agr. Code § 6072
The board of supervisors of the county may annually establish a fee for a permit to grow cotton within each cotton pests abatement district situated within the county and shall issue the permit to any cottongrower who satisfies the requirements of this chapter. The board of supervisors shall determine the amount of the fee by dividing the budget by the number of acres which will be devoted to cotton production during the ensuing growing season as reported on the register of cottongrowers submitted to the board of supervisors on March 1st of each year. Special benefits which are included in the budget shall be paid for by an additional permit fee. This additional fee shall be based on the estimated cost of the benefit to be conferred on the specific property.
Ca. Food and Agric. Code § 6072