Mo. Rev. Stat. § 334.704
No person shall hold himself or herself out as an athletic trainer in this state unless such person has been licensed as such under the provisions of sections 334.700 to 334.725.
(L. 1983 H.B. 162 & 274 § 3, A.L. 2004 H.B. 1399 merged with S.B. 962)