Missouri Revised Statutes Title XIV. Roads and Waterways § 226.380. Areas prohibited from certain uses

(1) Buildings, pole lines and structures may remain or be erected on such areas, to serve farms, residence and such other purposes as may be determined to be consistent with parkway plans by the secretary;

(2) New buildings, structures, or major alterations to existing buildings or structures shall be subject to the prior approval of the secretary;

(3) No additional commercial buildings, industrial structures, power or communication lines or other public utilities be erected or constructed on such areas;

(4) No dump of ashes, trash, sawdust, metals or any other unsightly or offensive material shall be placed on such area;

(5) No sign, billboard or advertisement shall be displayed or placed upon such areas, except one sign not greater than four square feet advertising the sale of the property or products raised upon it, except in commercial areas zoned therefor by the secretary.