; 50 Stat. 875; 43 U.S.C. 1181f ) and inserting (chapter 876; 50 Stat. 875; 43 U.S.C. 2605 ) ; and (B) striking (chapter 144; 53 Stat. 753; 43 U.S.C. 1181f–1 et seq.) and inserting (chapter 144; 53 Stat. 753