effort, responsibility, and working conditions. . (b) Conforming amendment Section 13(a) ( 29 U.S.C. 213(a) ) is amended in the matter before paragraph (1) by striking section 6(d) and inserting sections 6 (d) and (h) . 4. Prohibited acts Section 15(a) ( 29 U.S.C. 215(a) ) is amended— (1) by striking the period at the end of paragraph (5) and inserting a semicolon