The project for the control of floods of the Mississippi River and its tributaries, adopted by section 702a of this title, is modified in accordance with the recommendations of section 43 of the report submitted by the Chief of Engineers to the Chairman of the Committee on Flood Control, dated February 12, 1935, and printed in House Committee on Flood Control Document Numbered 1, Seventy-fourth Congress, first session, as, in sections 642a, 702a–2 to 702a–12, 702g–1, 702j–1, 702j–2, 702k–1, and 702k–2 of this title, further modified and amended; and as so modified is adopted and authorized and directed to be prosecuted under the direction of the Secretary of the Army and the supervision of the Chief of Engineers.