Missouri Revised Statutes § 454.1545

454.1545. Continuing, exclusive jurisdiction to modify spousal support order. — (a) A tribunal of this state issuing a spousal support order consistent with the law of this state has continuing, exclusive jurisdiction to modify the spousal support order throughout the existence of the support obligation. (b) A tribunal of this state may not modify a spousal support order issued by a tribunal of another state or a foreign country having continuing, exclusive jurisdiction over that order under the law of that state or foreign country. (c) A tribunal of this state that has continuing, exclusive jurisdiction over a spousal support order may serve as: (1) an initiating tribunal to request a tribunal of another state to enforce the spousal support order issued in this state; or (2) a responding tribunal to enforce or modify its own spousal support order. (L. 2011 H.B. 260) Effective 6-15-16, see § 454.1728