Mo. Rev. Stat. § 227.559

Any home rule city having a population of sixty thousand inhabitants or greater or any charter county of the first classification may adopt ordinances, policies, resolutions, or regulations consistent with sections 227.551 to 227.559 regarding the relocation of utility facilities located within the right-of-way of streets, highways, or roads under their respective jurisdiction, which are not state highways. Any ordinance, policy, resolution, or regulation adopted under the authority of this section shall not infringe upon, negate or otherwise abrogate an owner's right to construct, own, operate, and maintain utility facilities within the right-of-ways of such political subdivision that the owner otherwise enjoyed prior to the adoption of such ordinance, policy, resolution, or regulation.