list one of the significant changes of the conception of interstate commerce
Interstate Commerce Act of 1887 Congress passed a minor amendment to the Act in 1903, the Elkins Act.[13] Major amendments were enacted in 1906 and 1910. The Hepburn Act of 1906 authorized the ICC to set maximum railroad rates, and extended the agency's authority to cover bridges, terminals, ferries, sleeping cars, express companies and oil pipelines.[14] The Mann-Elkins Act of 1910 strengthened ICC authority over railroad rates and expanded its jurisdiction to include regulation of telephone, telegraph, and cable companies.[15] The Valuation Act of 1913 required the ICC to organize a Bureau of Valuation that would assess the value of railroad property. This information would be used to set freight shipping rates.[16]