168.081. After September 1, 1988, no person without a valid Missouri certificate shall:
(1) Engage in the practice of teaching or the performance of education duties in grades kindergarten through twelve in any public school in the state;
(2) Act as a school administrator in any public school district, unless such person obtains a temporary administrator certificate pursuant to section 168.083.
(L. 1963 p. 200 § 9-8, A.L. 1984 H.B. 1457 & 1501, A.L. 2002 S.B. 722)(Source: RSMo 1959 § 168.020)
Missouri General Assembly