Mo. Rev. Stat. § 89.400
When the planning commission of any municipality adopts a city plan which includes at least a major street plan or progresses in its city planning to the making and adoption of a major street plan, and files a certified copy of the major street plan in the office of the county recorder of the county in which the municipality is located, no plat of a subdivision of land lying within the municipality shall be filed or recorded until it has been submitted to and a report and recommendation thereon made by the commission to the city council and the council has approved the plat as provided by law.
(L. 1963 p. 146 § 11)