sentences:  Like every other state in the United States, driving under the influence is a crime in Missouri, and is subject to a great number of regulations outside of the Liquor Control Law.Missouri's maximum blood alcohol level for driving is .08% for persons over the age of 21 and .02% for minors and adults under age 21.Ordinarily, DUI is a misdemeanor in Missouri, although the third DUI conviction becomes a felony.