(1) A governmental entity legally authorized to issue general revenue bonds may create a property assessed energy improvement district by adoption of an ordinance.
(2) A combination of governmental entities may create a district by each governmental entity: Adopting an ordinance that provides for the governmental entity's participation in the district; and
(3) Entering into a joint agreement with one (1) or more other participating governmental entities.
(4) This section shall not limit additional governmental entities from becoming members of the district under § 8-15-106.