Miss. Code § 77-7-211
Every common carrier of passengers shall file with the commission, and print and keep open for public inspection, tariffs showing all the rates, fares and charges for transportation, and all services in connection therewith, between points on its own route, and between points on its own route and points on the route of any other such carrier, or on the route of any common carrier by railroad, express or water, when a through route and joint rate has been established. Such rates, fares and charges shall be stated in terms of lawful money of the United States. The tariffs required by this section shall be published, filed and posted in such form and manner, and shall contain such information as the commission by regulation shall prescribe. The commission is authorized to reject any tariff filed with it which is not in consonance with this section and with such regulations. Any tariff so rejected by the commission shall be void and its use shall be unlawful.
No common carrier of passengers, unless otherwise provided by this chapter, shall engage in the transportation of passengers unless the rates, fares and charges upon which the same are transported by the carrier have been filed and published in accordance with the provisions of this chapter.
Miss. Code § 77-7-211