(a) This subchapter applies to a municipal power agency created by two or more public entities under Subchapter C or a predecessor statute, including an agency re-created under Section 163.055 or a predecessor statute.
(b) The participating public entities of a municipal power agency may by concurrent ordinance elect to apply this subchapter to the agency as an alternative to Subchapter C.

(c) Concurrent ordinances described by this section must, as adopted by each public entity:
(1) contain identical provisions; and
(2) state that the public entity has elected that the agency shall, on and after the date designated in the ordinance, be governed by the provisions of this subchapter.