Mo. Rev. Stat. § 337.347
For reimbursement and billing purposes of section 376.1224, services provided by a provisionally licensed assistant behavior analyst, a provisionally licensed behavior analyst, or a temporary licensed behavior analyst shall be billed by the supervising licensed behavior analyst.
(L. 2012 H.B. 1563, A.L. 2018 S.B. 975 & 1024 Revision)