Bills for the charges and rates shall be made out by the city clerk. The time of making such bills and the period to be covered thereby shall be in accordance with the water meter reading practices of the city, for all lots, parcels of land and premises with respect to which such meter readings are used as a basis for the charges or rates. In all cases, bills shall be made out monthly. All rates and charges shall be payable at the office of the city collector and shall be collected by the city collector. (Prior code § 38-4-7)