Service shall be from the fifteenth of one month to the fifteenth of the following month. All fees provided for in this chapter shall become due on the fifteenth of the month and shall become delinquent on the tenth of the month following the due date. The delinquent amount shall incur a penalty of five percent of the delinquent amount. (Ord. 390 (part), 1994: Ord. 389 (part), 1994: Ord. 342 (part), 1987: prior code § 4-5-29)