Mo. Rev. Stat. § 452.354
Modification of child support, attorney fees awarded to state, when.
452.354. Modification of child support, attorney fees awarded to state, when. — In all proceedings for the modification of child support where the state is a party, the court may, upon motion, award court costs and reasonable attorney fees to the state.
(L. 2009 H.B. 481 § 1)