Texas Health and Safety Code - HEALTH & SAFETY § 285.166. Effective Date

(a) The adoption or abolition of the tax or a change in the rate of the tax takes effect on the first day of the first calendar quarter occurring after the expiration of the first complete calendar quarter occurring after the date the comptroller receives a notice of the results of the election.

(b) If the comptroller determines that an effective date provided by Subsection (a) will occur before the comptroller can reasonably take the action required to begin collecting the tax or to implement the abolition of the tax or the change in the rate of the tax, the effective date may be extended by the comptroller until the first day of the next calendar quarter.