Any municipality incorporated under the laws of Alabama which is situated within the territorial limits of any power district proposed to be served by any public nonprofit corporation now or hereafter organized under the laws of Alabama for the purpose of acquiring and operating facilities for the production, transmission, and distribution of electricity and related service within a power district composed of all or parts of any three or more connecting counties shall have the power to advance funds to such corporation for the purpose of paying the preliminary organization and administration expenses of such corporation. Any funds so advanced shall be repayable within such time, not exceeding one year from the date of such advancement, and on such terms as may be provided by the governing body of such municipality and agreed to by such corporation.