Section 70.282
The rates fixed pursuant to this division are estimated to be sufficient to provide for the payment of the expenses of administration and operation and such expenses for maintenance of the system as are necessary to preserve the system in good repair and working order, to provide for the payment of the interest upon and the principal of all the bonds as and when the interest and principal become due and payable and the creation of the reserve therefor required by this article, and to provide for such other expenditures and funds for the system as this article may require. Such rates shall be fixed and revised from time to time as may be necessary to produce these amounts, and it is hereby covenanted and agreed at all times to fix and maintain such rates for services furnished by the system as shall be sufficient to provide for the expenses mentioned in this section. (Comp. Ords. 1987, § 25.060)