(a) A county with a population of 60,000 or less and a municipality that, with respect to the same active military installation, constitutes a defense community, as defined by Section 397.001, may agree by order, ordinance, or other means to establish and fund a regional military sustainability commission under this subchapter in an area that is located:
(1) in the same county as the active military installation; and
(2) in the extraterritorial jurisdiction of the municipality.
(b) Defense communities may not establish more than one commission in a county.
(c) A commission's territory consists of the unincorporated area located within five miles of the boundary line of a military installation designated as the commission's territory when the commission is established.
(d) This subchapter shall be narrowly construed in conformity with the findings and purposes under Section 397A.001.