SEC. 11.04  LEASE OF PLANT.
   The council may, if the public interest will be served thereby, contract with any responsible person, co-partnership, or corporation for the operation of any utility owned by the city, upon such rentals and conditions as it may deem necessary; but such contract shall be embodied in and let only by an ordinance. Such ordinance shall not be an emergency ordinance. In no case shall such contract be for a longer term than ten years.