§ 20. Sinking fund.

The revenues, fees, tolls and earnings derived from any particular project or projects, regardless of whether or not such fees, earnings and revenues were produced by a particular project for which bonds have been issued and any monies derived from the sale of any properties, both real and personal, of the authority, unless otherwise pledged and allocated, may be pledged and allocated by the authority to payment of the principal and interest on revenue bonds of the authority as the resolution authorizing the issuance of the bonds or in the trust instrument may provide, and such funds so pledged from whatever source received, which said pledge may include funds received from one or more or all sources, shall be set aside at regular intervals as may be provided in the resolution or trust indenture, into a sinking fund, which said sinking fund shall be pledged to, and charged with, the payments of (1) the interest upon such revenue bonds as such interest shall fall due, (2) the principal of the bonds as the same shall fall due, (3) the necessary charges of paying agent or agents for paying interest and principal, and (4) any premium upon bonds retired by call or purchase as hereinabove provided. The use and disposition of such sinking fund shall be subject to such regulations as may be provided in the resolution authorizing the issuance of the revenue bonds or in the trust indenture, but, except as may otherwise be provided in such resolution or trust indenture, such sinking fund shall be a fund for the benefit of all revenue bonds, without distinction or priority of one over another. Subject to the provisions of the resolution authorizing the issuance of the bonds or in the trust indenture, surplus monies in the sinking fund may be applied to the purchase or redemption of bonds and any such bonds so purchased or redeemed shall forthwith be cancelled and shall not again be issued.