Mo. Rev. Stat. § 387.402

Notwithstanding any other provision of law, TNCs and TNC drivers shall not be considered common carriers, contract carriers, or motor carriers, as defined in section 390.020, a taxicab, as defined in section 390.020, a taxicab service or association, or a for-hire vehicle service. A TNC driver shall not be required to register the vehicle such driver uses to provide prearranged rides as a commercial or for-hire vehicle.