Apparently that's just the title, though what the proposition does is apparently appending a similarly incomprehensible sentence to the state consitution:

        BE IT RESOLVED BY THE LEGISLATURE OF THE STATE OF TEXAS:
          SECTION 1.  Section 1-b, Article VIII, Texas Constitution,
   is amended by adding Subsection (d-2) to read as follows:
          (d-2)  Notwithstanding Subsections (d) and (d-1) of this
   section, the legislature by general law may provide for the
   reduction of the amount of a limitation provided by Subsection (d)
   of this section and applicable to a residence homestead for a tax
   year to reflect any statutory reduction from the preceding tax year
   in the maximum compressed rate, as defined by general law, or a
   successor rate of the maintenance and operations taxes imposed for
   general elementary and secondary public school purposes on the
   homestead. A general law enacted under this subsection may take
   into account the difference between the tier one maintenance and
   operations rate for the 2018 tax year and the maximum compressed
   rate for the 2019 tax year applicable to a residence homestead and
   any reductions in subsequent tax years before the tax year in which
   the general law takes effect in the maximum compressed rate
   applicable to a residence homestead.

For this reason it should be voted against, as it makes the state constitution illegible, but as for what it does I haven't a single clue.