Missouri constitution
Article III: legislative department
Section 51

The initiative shall not be used for the
appropriation of money other than of new revenues created and provided for thereby,
or for any other purpose prohibited by this constitution. Except as provided in this
constitution, any measure proposed shall take effect when approved by a majority of
the votes cast thereon. When conflicting measures are approved at the same election
the one receiving the largest affirmative vote shall prevail.