The fees provided for in §§ 7.07.017 and 7.07.018 shall be paid to the county through the Office of the Agricultural Commissioner. The fees shall be due and payable on the first day of the month following the month in which the inspection was performed, and shall be delinquent on the tenth day of the following month. A grower, shipper or other interested person whose account becomes delinquent may, at the discretion of the Agricultural Commissioner, be required to pay the fees at the time of issuance of the certificates.