(a) A municipality that owns its natural gas distribution system and that has conducted an election before July 13, 1959, that resulted in a vote to sell the system may, by majority vote of the governing body, enter a contract to lease the system to any person. The municipality may also grant an option to the lessee or other person to purchase the system at a price specified or determined in the manner provided by the lease or option contract.
(b) If the municipality has any outstanding bonds that are payable from the revenues of the system, unless the municipality provides for the full payment of the bonds with interest to their maturities or to the date the bonds are to be redeemed before maturity, it may not enter a lease or option contract except under the conditions specified in the ordinance that authorized the bonds.