Mo. Rev. Stat. § 327.314
Any person may apply to the board for examination and license as a professional land surveyor who has been enrolled as a land surveyor-in-training for a period of not less than one year and who has presented evidence to the satisfaction of the board that such person has completed the following requirement: a person who applied for enrollment as a land surveyor-in-training under the provisions of subsection 1 or 2 of section 327.312 must have acquired at least two years of satisfactory professional field and office experience in land surveying projects under the immediate personal supervision of a professional land surveyor in addition to the experience required for enrollment as a land surveyor-in-training. A person who applied for enrollment as a land surveyor-in-training under the provisions of subsection 3 of section 327.312 must have acquired at least one year of satisfactory professional field and office experience in land surveying projects under the immediate personal supervision of a professional land surveyor in addition to the experience required for enrollment as a land surveyor-in-training. At any time prior to January 1, 1991, any person possessing the experience qualifications above set forth may apply to the board for examination and license as a professional land surveyor if the applicant either:
(L. 1983 H.B. 319, A.L. 1999 H.B. 343)