American Express Co. v. South Dakota Ex Rel. Caldwell

In 1912 the Interstate Commerce Commission entered upon a comprehensive investigation of express rates, practices, accounts and revenues. Its report 1 resulted in the establishment, on February 1, 1914; throughout the United States, of the so-called uniform zone-and block system of rates in interstate transportation and the prompt adoption, in forty States, of the same system in intrastate transportation. 2 South Dakota did not adopt the national system. It adheres to a schedule of maximum express charges, known as Distance Tariff No. 2, which -was promulgated by its Board of Railroad…