The city clerk shall by virtue of his or her office be the collector of accounts due the city for the sale of water service and shall prepare the monthly bill of all such accounts from meter readings supplied him or her by employees of the department. All meters shall be read and accounts billed in accordance with the rules of the department. The city clerk shall keep separate accounts with each customer showing the complete transactions between the city and each such customer. He or she shall keep a separate water fund, a sales tax fund, and such other funds and accounts as may be required by ordinance or law. He or she shall prepare such monthly reports respecting the financial transactions of the business as may be required by the city manager. (Prior code § 17-102)