Mo. Rev. Stat. ยง 305.110
305.110 Leaving aircraft running โ penalty.
305.110. Leaving aircraft running โ penalty. โ Any person who shall leave any aircraft with its engine running, and unoccupied by a person able to control the same, and without blocking the same in such manner as to prevent such aircraft from moving, shall be deemed guilty of a misdemeanor.
(RSMo 1939 ยง 15115) Prior revision: 1929 ยง 13914