Mo. Rev. Stat. § 334.742
Any nonresident of Missouri who enters the state and intends to provide a service or practice for which a license is required pursuant to sections 334.735 to 334.749 may apply for a license, provided that the applicant meets the requirements imposed by the certifying entity.
(L. 1989 S.B. 217 § 6, A.L. 1998 H.B. 1601, et al.)