Mo. Rev. Stat. § 60.150: Survey may be legal evidence, standards for survey.

No survey or resurvey shall be admitted into evidence in any court in this state unless it is made by a registered land surveyor, and it can be shown that the survey is located by measurements to monuments of the section, United States survey, subdivision, or other unit in which the property is legally described. A survey may not be rejected, after August 28, 1991, solely on the grounds that it did not commence at a government corner.