Missouri Revised Statutes Title XXV. Incorporation and Regulation of Certain Utilities and Carriers § 390.011. Purpose of law--how construed

(1) To promote safe, adequate, economical and efficient transportation;

(2) To promote the most productive use of equipment and energy resources; and

(3) To conserve the interests and convenience of the public. No right, privilege, or permit granted or obtained under or by virtue of the provisions of this chapter shall ever be construed as a vested right, privilege, or permit; and the general assembly retains full legislative power over, concerning and pertaining to the subject or subjects legislated upon in this chapter and the power and right to alter, amend or repeal any provision of this chapter at its pleasure.