In the event the township has issued revenue bonds pursuant to article 16, chapter 80 of the Kansas Statutes Annotated, or any other law of this state, which are then outstanding and for the payment of which the revenues of the water system of the township or any part thereof have been pledged, it may, if the governing body deems it necessary, refund the outstanding bonds in the manner provided by and subject to the provisions of K.S.A. 10-116a, and amendments thereto. Any bonds authorized to be issued for any purpose under this act may be combined into one issue of bonds. The township may pledge all or any part of the revenues derived from its waterworks system, including its common water supply and its distribution system, to pay the interest on and principal of bonds issued as herein provided. The resolution authorizing the issuance of such revenue bonds may contain such other covenants, agreements and restrictions as may be deemed necessary or advisable by the governing body of such township in order to insure the payment of the same.
K.S.A. 12-2709