Effective – 28 Aug 1957
10.050. State song. — The song “Missouri Waltz”, arranged by Frederick Knight Logan from a melody by John Valentine Eppel, with lyrics by J. R. Shannon, is the official state song of Missouri.
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(L. 1949 p. 275 § 1, RSMo 1949 § 10.100, A.L. 1957 p. 726)