The sewer service charge system and sewer service fund shall be administrated according to the following provisions:
   (A)   The City Clerk shall maintain a proper system of accounts suitable for determining the operation and maintenance, equipment replacement and debt retirement costs of the treatment works, and shall furnish the City Council with a report of those costs annually.  The City Council shall annually determine whether or not sufficient revenue is being generated for the effective operation, maintenance, replacement and management of the treatment works, and whether sufficient revenue is being generated for debt retirement.  The Council will also determine whether the user charges are distributed proportionately to each user in accordance with § 52.113(B).  The city shall thereafter, reassess and as necessary revise the Sewer Service Charge System then in use to ensure the proportionality of the user charges and to ensure the sufficiency of funds to maintain the capacity and performance to which the facilities were constructed, and to retire the construction debt.
   (B)   In accordance with federal and state requirements, the City Clerk shall be responsible for maintaining all records necessary to document compliance with the Sewer Service Charge System adopted.
   (C)   Bills for sewer service charges shall be rendered on a monthly basis succeeding the period for which the service was rendered and shall be due on the fifteenth day of the following month.  Any bill not paid in full by the due date will be considered delinquent.  The penalty shall be computed at 5% of the original bill and shall be increased the same 5% for every month the bill is outstanding. 
   (E)   The owner of the premises shall be liable to pay for the service to their premises, and the service is furnished to the premises by the city only upon the condition that the owner of the premises is liable therefore to the city.
   (F)   Any additional costs caused by discharges to the treatment works of toxics or other incompatible wastes, including the cost of restoring wastewater treatment services, clean up and restoration of the receiving waters and environs, and sludge disposal, shall be borne by the discharger of the wastes, at no expense to the city.