The board of township trustees of any township authorized to issue water utility revenue bonds under Kan. Stat. Ann. §§ 80-1601 to 80-1605, inclusive, and amendments thereto, and which said township board has heretofore authorized or issued, or may hereafter authorize or issue such water utility revenue bonds under the provisions of said sections, be and said township board is hereby authorized and empowered to refund any and all outstanding water utility revenue bonds of such township and to issue in lieu thereof, negotiable refunding revenue bonds of such township and water utility in the manner prescribed by and subject to the provisions of Kan. Stat. Ann. § 10-116a.