Mo. Rev. Stat. § 115.294
Reason for voting absentee not stated on ballot envelope, effect.
115.294. Reason for voting absentee not stated on ballot envelope, effect. — Other provisions of law to the contrary notwithstanding, no absentee ballot shall be rejected for failure of the voter to state on the ballot envelope his reason for voting an absentee ballot.
(L. 1989 H.B. 884 § 1) Effective 5-04-89