(a) The adoption, change in the rate of, or abolition of a tax under this subchapter 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 on which the comptroller receives notice of the results of an election to adopt, change the rate of, or abolish the tax.
(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 change in the rate of the tax or the abolition of the tax, the effective date may be extended by the comptroller until the first day of the next calendar quarter.