Mo. Rev. Stat. § 622.150
The division may engage in any conferences with officials of any and all other states and the District of Columbia, territories and possessions of the United States and foreign countries for the purpose of promoting, entering into, and establishing fair and equitable reciprocal agreements or arrangements that in the judgment of the division are proper, expedient, fair, and equitable and in the interest of the state of Missouri and the citizens thereof to the end that any motor carrier of passengers or property which operates motor vehicles and trailers into, out of, or through this state as a for-hire motor carrier and which has paid all regulatory fees required by the state, District of Columbia, territory or possession of the United States or foreign country where the motor vehicles and trailers are duly licensed or registered pursuant to an agreement or arrangement entered into by the Missouri highway reciprocity commission, or if no such agreement or arrangement has been entered into, where the owner is a resident, shall not be required to pay fees prescribed in section 390.136; but the provisions of this section shall be operative as to a motor vehicle and trailer duly licensed or registered in a state, District of Columbia, territory or possession of the United States or foreign country pursuant to an agreement or arrangement entered into by the Missouri highway reciprocity commission and if no such agreement or arrangement has been entered into, where the owner is a resident, upon which all regulatory fees have been paid, when operated for hire in Missouri only to the extent that, under the laws of the state, District of Columbia, territory or possession of the United States or foreign country, wherein such motor vehicle and trailer are registered like exemptions are granted motor vehicles and trailers duly licensed or registered in Missouri which may be conducting similar motor carrier operations for hire in such other state, District of Columbia, territory or possession of the United States, or foreign country.
§ 622.150, RSMo