(70 ILCS 3705/23c) (from Ch. 111 2/3, par. 210c)
    Sec. 23c. Rates and charges for the use and service of sewerage properties acquired by any district organized under this Act shall be sufficient at all times to pay the cost of maintenance and operation of such properties, to pay the principal and interest of bonds issued under the provisions of Section 23b of this Act, and to provide a reasonable depreciation fund.
(Source: Laws 1951, p. 1615.)