Transmission Association Inc. / Electric Cooperative Association North Carolina Electric Membership Corporation / American Public Power Association Arizona Electric Power Cooperative Inc. / Tri-State Generation / Power Cooperative Central Iowa Power Cooperative CoBank / Tucson Electric Power UniSource Energy Corporation / BASF / /
Congress / Cooperative CoBank Colorado Association / Texas Municipal Power Agency Tri-State Generation and Transmission Association / Regulatory Utility Commissioners National Association / Surface Transportation Board / Energies Western Coal Traffic League / Arkansas GopherCURE Heartland Consumers Power District Iowa Association / Wisconsin National Association / Interstate Commerce Commission / Colorado Rural Electric Association Consumer Federation / Judiciary Committee / National Association of Wheat Growers / /