Mo. R. Civ. P. 84.15
The decision of the majority of the judges of this Court sitting en banc or of any district of the Court of Appeals sitting en banc shall be the decision of the court, but if in any case the judges shall be equally divided in opinion then an additional judge shall be temporarily transferred to the court or district pursuant to Section 6, Article V, of the Constitution and the case shall be reheard. The decision of the majority of the judges of a division of this Court shall be the decision of the court unless the case is transferred to the court en banc. Unless pursuant to its own rules a district of the Court of Appeals determines to hear a case en banc, the decision of a majority of a division of that district shall be the decision of the district.
Mo. R. Civ. P. 84.15