Mo. Rev. Stat. § 506.010

This code shall be known and cited as "The Civil Code of Missouri" and shall govern the procedure in the supreme court, court of appeals, and divisions of the circuit court in all suits and proceedings of a civil nature whether cognizable as cases at law or in equity, unless otherwise provided by law. It shall be construed to secure the just, speedy and inexpensive determination of every action. Such code shall not apply, however, to the practice and procedure before a circuit or associate circuit judge in the small claims court or the municipal division of the circuit court except to the extent that such provisions are otherwise specifically made applicable.