(A) The water service rates shall be as set, from time to time, by legislative authority. Bills will be mailed on a quarterly basis and will be determined by two intermittent annual readings and two estimated bills.
(B) For construction purposes, a flat rate of $25 shall be required for house building for each six-month period or part thereof.
(C) The above charges, except where metered, shall be payable when the tapping permit is issued.
(D) All consumers located outside the corporation limits shall have applied to the regular charges listed herein a 25% additional charge to minimum, metered usage tap fees, and service charges.