Mo. Rev. Stat. § 454.1599
Assistance with discovery.
454.1599. Assistance with discovery. — A tribunal of this state may:
(1) request a tribunal outside this state to assist in obtaining discovery; and
(2) upon request, compel a person over which it has jurisdiction to respond to a discovery order issued by a tribunal outside this state.
(L. 2011 H.B. 260) Effective 6-15-16, see § 454.1728