§24A-2-4. Rates, fares and charges.
All rates, fares and charges made by any common carrier by
motor vehicle shall be just and reasonable, and shall not be
unlawfully discriminatory, prejudicial nor preferential. No such
carrier shall charge, demand, collect, or receive a greater or
less or different remuneration for the transportation of
passengers or property, or for any service in connection
therewith, than the rates, fares, and charges which have been
legally established and filed with the commission; nor shall any
such carrier refund, remit, discount or rebate in any manner or
by any device any portion of the rates, fares, and charges
required to be collected by the tariffs on file with or ordered
by the commission.