Mo. Rev. Stat. § 226.963
If the commission recommends that the approval of the application or request be conditioned upon special modifications or limits, either the regulatory authority or the applicant property owner may reject the conditions, and written notice of this rejection shall be served upon the commission and the regulatory authority or applicant by personal delivery or certified mail. In the event the conditions requested by the commission are rejected, the commission shall be deemed to have given notice of probable intent to acquire the whole or any part of the subject property which is within the highway corridor on the date it received the written notice of rejection of its conditions, and no action shall be taken by the regulatory authority to approve the application or request at that time.
§ 226.963, RSMo