Mo. Rev. Stat. § 327.391
The board shall upon application issue a license to any engineer or professional land surveyor who is at least fifty years of age, who has at least twenty years of satisfactory experience, and who passes a written examination or holds a degree at the bachelor's level or higher in engineering or science and passes an oral examination, provided that any such application is accompanied by the required fee.
(L. 1969 S.B. 117, A.L. 1981 S.B. 16, A.L. 1999 H.B. 343)