Amend CSHB 438 by striking SECTIONS 2 and 3 of the bill and substituting the following: SECTION 2. This Act applies only to the appraisal of a residence homestead for ad valorem taxation for a tax year that begins on or after the effective date of this Act. SECTION 3. This Act takes effect January 1, 2008, but only if the constitutional amendment proposed by the 80th Legislature, Regular Session, 2007, authorizing the legislature to provide that the maximum appraised value of a residence homestead for ad valorem taxation is limited to the lesser of the most recent market value of the residence homestead as determined by the appraisal entity or 110 percent, or a greater percentage, of the appraised value of the residence homestead for the preceding tax year is approved by the voters. If that amendment is not approved by the voters, this Act has no effect.