In case the board of public utilities shall deem it necessary and expedient to vote general obligation bonds for the construction, extension or improvement of the water plant and/or the electric-light plant for the purpose of producing and supplying such city and its inhabitants with water and/or electricity it shall be the duty of the mayor of such city, within thirty days after receiving written request from the board, to issue a proclamation for holding an election to vote such general obligation bonds in the amount requested by the board and agreed to by the city.

If a majority of the votes cast at such election shall be in favor of the issuance of such bonds the governing body of such city may issue and sell such bonds in such amounts and at such time or times as are needed, the proceeds thereof to be delivered to the treasurer of the board. The election provided for in this section shall be held in accordance with the general obligation bond election laws of the state of Kansas, and the cost thereof, if held on dates other than the regular city elections, shall be paid by the board.