Mo. Rev. Stat. § 452.865
Current with changes from the 2023 Legislative Session
If a proceeding for enforcement under sections 452.850 to 452.915 has been or is commenced in this state and a court of this state determines that a proceeding to modify the determination has been commenced in another state having jurisdiction to modify the determination under sections 452.740 to 452.845, the enforcing court shall immediately communicate with the modifying court. The proceeding for enforcement continues unless the enforcing court, after consultation with the modifying court, stays or dismisses the proceeding.
§ 452.865, RSMo