Mo. Rev. Stat. § 311.212: Licenses, suspension or revocation of, violations occurring more than three years prior, not valid grounds.

The division of liquor control shall not suspend, revoke, refuse to renew or refuse to grant a license issued under the provisions of this chapter based on a violation of any provision of this chapter or of any rule or regulation promulgated by the supervisor of liquor control, when such violation occurred more than three years prior to the division's decision to suspend, revoke, refuse to renew or refuse to grant such license.