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          A BILL TO BE ENTITLED
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          AN ACT
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        relating to school district ad valorem tax rates. | 
      
      
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               BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS: | 
      
      
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               SECTION 1.  Section 26.08, Tax Code, is amended by adding  | 
      
      
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        Subsections (q) and (r) to read as follows: | 
      
      
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               (q)  This subsection applies only to a school district  | 
      
      
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        described by Subsection (n) whose adopted tax rate was approved at  | 
      
      
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        an election under this section in the 2006 tax year or any  | 
      
      
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        subsequent tax year.  Notwithstanding Subsection (n), for purposes  | 
      
      
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        of this section, the rollback tax rate of the school district is the  | 
      
      
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        higher of: | 
      
      
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                     (1)  the amount computed under Subsection (n); or | 
      
      
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                     (2)  the sum of the following: | 
      
      
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                           (A)  the highest maintenance and operations tax  | 
      
      
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        rate adopted by the district for the 2007 tax year or any subsequent  | 
      
      
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        tax year in which the adopted tax rate of the district was approved  | 
      
      
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        at an election under this section; and | 
      
      
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                           (B)  the district's current debt rate. | 
      
      
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               (r)  Subsection (q) applies to a school district only if the  | 
      
      
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        district has adopted a tax rate equal to or higher than the rate  | 
      
      
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        provided by that subsection for any tax year in the preceding 10 tax  | 
      
      
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        years. | 
      
      
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               SECTION 2.  (a)  The comptroller of public accounts shall  | 
      
      
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        conduct a study to determine: | 
      
      
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                     (1)  the number of school districts that adopt an ad  | 
      
      
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        valorem tax rate for the tax year in which this Act takes effect  | 
      
      
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        that is lower than the district's ad valorem tax rate for the tax  | 
      
      
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        year preceding that tax year and then, for the tax year following  | 
      
      
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        the tax year in which this Act takes effect, adopt an ad valorem tax  | 
      
      
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        rate that is higher than the district's ad valorem tax rate for the  | 
      
      
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        tax year in which this Act takes effect; and | 
      
      
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                     (2)  the number of school districts that adopted an ad  | 
      
      
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        valorem tax rate for the second tax year preceding the tax year in  | 
      
      
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        which this Act takes effect that was lower than the district's ad  | 
      
      
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        valorem tax rate for the tax year preceding that tax year and then,  | 
      
      
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        for the tax year preceding the tax year in which this Act takes  | 
      
      
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        effect, adopted an ad valorem tax rate that was higher than the  | 
      
      
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        district's ad valorem tax rate for the second tax year preceding the  | 
      
      
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        tax year in which this Act takes effect. | 
      
      
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               (b)  The comptroller of public accounts shall report the  | 
      
      
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        results of the study conducted under this section to each member of  | 
      
      
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        the legislature not later than December 1, 2019. | 
      
      
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               SECTION 3.  (a)  The change in law made by this Act applies to  | 
      
      
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        the ad valorem tax rate of a school district beginning with the 2017  | 
      
      
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        tax year, except as provided by Subsection (b) of this section. | 
      
      
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               (b)  If the governing body of a school district adopted an ad  | 
      
      
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        valorem tax rate for the school district for the 2017 tax year  | 
      
      
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        before the effective date of this Act, the change in law made by  | 
      
      
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        this Act applies to the ad valorem tax rate of that school district  | 
      
      
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        beginning with the 2018 tax year, and the law in effect when the tax  | 
      
      
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        rate was adopted applies to the 2017 tax year with respect to that  | 
      
      
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        school district. | 
      
      
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               SECTION 4.  This Act takes effect immediately if it receives  | 
      
      
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        a vote of two-thirds of all the members elected to each house, as  | 
      
      
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        provided by Section 39, Article III, Texas Constitution.  If this  | 
      
      
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        Act does not receive the vote necessary for immediate effect, this  | 
      
      
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        Act takes effect September 1, 2017. |