By: VanDeaver, Howard H.B. No. 486       A BILL TO BE ENTITLED   AN ACT   relating to the calculation of the rollback tax rate of a school   district.          BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS:          SECTION 1.  Section 26.08, Tax Code, is amended by adding   Subsections (q) and (r) to read as follows:          (q)  This subsection applies only to a school district   described by Subsection (n) whose adopted tax rate was approved at   an election under this section in the 2006 tax year or any   subsequent tax year. Notwithstanding Subsection (n), for purposes   of this section, the rollback tax rate of the school district is the   higher of:                (1)  the amount computed under Subsection (n); or                (2)  the sum of the following:                      (A)  the highest maintenance and operations tax   rate adopted by the district for the 2007 tax year or any subsequent   tax year in which the adopted tax rate of the district was approved   at an election under this section; and                      (B)  the district's current debt rate.          (r)  Subsection (q) applies to a school district only if:                (1)  the district has adopted a tax rate equal to or   higher than the rate provided by that subsection for any tax year in   the preceding 10 tax years; and                (2)  in the 2016 tax year or any subsequent tax year the   district adopted a tax rate that was lower than the tax rate   described by Subsection (q)(2).          SECTION 2.  The change in law made by this Act applies to the   ad valorem tax rate of a school district beginning with the 2018 tax   year.          SECTION 3.  This Act takes effect January 1, 2018.