(a) This section applies only to a:
(1) municipality that is included in a regional transportation authority created under Chapter 452, Transportation Code; and
(2) county that is included within the boundaries of a regional transportation authority created under Chapter 452, Transportation Code.
(b) If the adoption or increase of the tax under this subchapter would otherwise result under § 334.085 in the reduction of the tax rate of the transportation authority, the election to approve or increase the tax under this subchapter is to be treated for all purposes as an election to withdraw from the authority in accordance with and subject to Subchapter Q, Chapter 452, Transportation Code.

(c) The ballot language at an election to which this section applies must clearly state that the adoption or increase of the tax under this subchapter will result in the withdrawal of the municipality or county from the transportation authority.
(d) A municipality or county subject to this section that votes to adopt or increase the tax under this subchapter may not impose that tax before the date on which the municipality’s or county’s financial obligations to the authority are satisfied in accordance with Subchapter Q, Chapter 452, Transportation Code.