Tex. Utilities Code § 163.055
RE-CREATION OF AGENCY.
(a) The public entities that create an agency may by concurrent ordinances re-create the agency by adding or deleting, or both, a public entity.
(b) The public entities may not re-create an agency if the re-creation will impair an agency obligation.
(c) Re-creation by adding a public entity is subject to voter approval in accordance with Section 163.058.