(a) A Type A general-law municipality may not sell or lease a water system and plant owned by the municipality unless the question of the sale or lease is first approved by a majority of the qualified voters of the municipality who vote on the question at a referendum. The governing body of the municipality may provide for submission of the question at a general or special election.
(b) Before the 20th day before the date of the election, the proposed lease or sales agreement must be plainly set out in the form of an ordinance or contract and must be filed in the office of the secretary or clerk of the municipality, where it shall be available for public inspection at all times.