Mo. Rev. Stat. § 302.425

Any court which has jurisdiction over violations of state, county or municipal laws shall enter an order, in addition to other orders authorized by law, requiring the completion of a substance abuse traffic offender program as defined in section 302.010, as a part of the judgment entered in the case, for any person determined to have violated a state, county, or municipal law involving the possession or use of alcohol and who at the time of said offense was under twenty-one years of age when the court, if a juvenile court, finds that the offense was committed by such person or, if a city, county, or state court, when the person pleads guilty, or is found guilty of such offense by the court.