Executive Order 6204 Regarding Interstate Commerce of Petroleum.
By virtue of the authority vested in me by the Act of Congress entitled "An Act to encourage national industrial recovery, to foster fair competition, and to provide for the construction of certain useful public works, and for other purposes," approved June 16, 1933 (Public No. 67, 73d Congress), in order to effectuate the intent and purpose of the Congress as expressed in Section 9(c) thereof, and for the purpose of securing the enforcement of my order of July 11, 1933, issued pursuant to said Act, I hereby authorize the Secretary of the Interior to exercise all the powers vested in me, for the purpose of enforcing Section 9-C of said Act and said order, including full authority to designate and appoint such agents and to set up such boards and agencies as he may see fit, and to promulgate such rules and regulations as he may deem necessary.
Franklin D. Roosevelt, Executive Order 6204 Regarding Interstate Commerce of Petroleum. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/208762