K.S.A. 73-401 through 73-410; federal aid. The governing body of any city of the first class in the state of Kansas which has under the provisions of Kan. Stat. Ann. §§ 73-401 to 73-410, both inclusive, and acts amendatory and supplementary thereto, erected a military memorial building for the purposes designated in said sections, may issue additional bonds not to exceed the sum of seventy-five thousand dollars, the proceeds whereof to be used in repairing, equipping and improving said military memorial building; Provided, however, If said governing body of said city shall be able to procure from the United States government, directly or indirectly, funds for the purpose specified herein, the amount of said bonds authorized to be issued shall be reduced in the amount of any such funds obtained from the government.