Benjamin N. Cardozo,
Atlantic Coast Line Company v. Florida…
“ The constitutional power of Congress to regulate interstate commerce and the incidental power to prevent unjust discrimination against that commerce by intrastate rates, is not self-executing, but must be exercised by appropriate legislation. Until Congress acts the states are free to regulate intrastate commerce as they see fit, subject only to the limitations set by the Fourteenth Amendment. By the Interstate Commerce Act (49 USCA § 1 et seq.) the regulation of interstate rates was vested exclusively in the interstate Commerce Commission. ”
