(a) The provisions of this subchapter shall be implemented by school districts.     
      (b) The provisions of §§112.34, 112.35, 112.38, and 112.39 of this subchapter adopted in 2017 shall be implemented by school districts beginning with the 2018-2019 school year.     
     Source Note:        The provisions of this §112.31 adopted to be effective August 4, 2009, 34 TexReg 5062; amended to be effective August 24, 2010, 35 TexReg 7230; amended to be effective August 27, 2018, 42 TexReg 5052