In municipalities as defined herein, if the utilities plants thereof are under the control and management of a board of public utilities as provided by law, when three-fifths of said board of public utilities shall deem it necessary and expedient that revenue bonds be issued for any of the purposes provided for herein, it shall be the duty of the governing body of such city within ten days after receiving written request from said board of public utilities to take the necessary steps for the issuance of such revenue bonds and the governing bodies of such city shall issue and sell such bonds as requested by the board of public utilities, the proceeds thereof to be delivered to the treasurer of the board of public utilities. That where it is necessary, as provided herein, to hold an election to submit the question of the issuing of such revenue bonds to the qualified electors of the municipality, such elections shall be held in accordance with the provisions herein and the general bond election laws of the state of Kansas and the cost thereof, if held on dates other than the dates of the regular city election, or general election shall be paid by the board of public utilities of such city.