Any city of the second class in which city bonds were voted during the year, 1937, in an amount not exceeding twenty thousand dollars, for the purpose of erecting a memorial armory building under the provisions of Kan. Stat. Ann. §§ 73-401 to 73-410, both sections inclusive, and amendments thereto, and the proceeds of such bonds were expended in the erection of a memorial armory building according to approved plans therefor, and such funds so created and provided were insufficient to complete said memorial according to such plans, and additional funds in the sum of approximately twelve thousand dollars are necessary for the proper completion and equipment of said memorial armory building, and such city is the owner of a waterworks and power and light plant, and revenues are derived by such city from the sale and consumption of water, power, and light, such city is hereby authorized, by resolution of the governing body of such city, to transfer from said waterworks, power and light funds, when surpluses of such funds exist and are not needed for payment of outstanding bonds, or interest on outstanding bonds or any obligations incurred for the construction of such plant or plants, or the renewal, extension or operation of such plant or plants from which such fund or funds were derived, in the total sum of twelve thousand dollars over a period of three years, and to use said funds so transferred from said utility fund or funds for the purpose of completing and equipping said memorial building, and thus to complete and equip said memorial building: Provided, however, That any portion of said amount may be so transferred and used in any year during said period of time, but that the aggregate so transferred and used shall not exceed the total sum of twelve thousand dollars.