Billing of sewage rates and charges shall be on a monthly basis. All bills shall be payable within 15 days after the due date thereof as stated in the bill and any bill not so paid shall be promptly collected and enforced in the manner and subject to the penalties provided in IC 36-9-23-25, 36-9-23-26, 36-9-23-28 and 36-9-23-34 and all amendments and supplements thereto.
('80 Code, § 13.40.040) (Ord. 12-1973, passed - -73) Penalty, see § 51.999