In addition to paying the amount of the fee, any service user who fails to pay any fee imposed by this chapter, within 60 days of the date of the notice of the amount of fee due from the service supplier, shall pay a penalty of 10% of the amount of the fee which shall be added on the last day of each month following the date on which payment was due until the fee and penalties are paid.
('61 Code, § 23B.14) (Ord. 920, passed - - ) Penalty, see § 53.99