Mo. Rev. Stat. § 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.