Mo. Rev. Stat. § 454.1554
Application of law of state.
454.1554. Application of law of state. — Except as otherwise provided by sections 454.1500 to 454.1728 , a responding tribunal of this state shall:
(1) apply the procedural and substantive law generally applicable to similar proceedings originating in this state and may exercise all powers and provide all remedies available in those proceedings; and
(2) determine the duty of support and the amount payable in accordance with the law and support guidelines of this state.
(L. 2011 H.B. 260) Effective 6-15-16, see § 454.1728