Excerpt from Construction and Constitutionality of the Long and Short Haul Clause of the Interstate Commerce Act as Amended: June 18, 1910
The proviso to the above section is practically the same as the proviso contained in section 4 of the Act to Это и многое другое вы найдете в книге Construction and Constitutionality of the Long and Short Haul Clause of the Interstate Commerce Act as Amended