Editorial Notes Codification Section 1857f–9, act July 14, 1955, ch. 360, title II, § 231, as added Dec. 31, 1970 , Pub. L. 91–604, § 11(a)(1) , 84 Stat. 1703 , which related to the establishment of aircraft emission standards, was transferred to section 7571 of this title . Section 1857f–10, act July 14, 1955, ch. 360, title II, § 232, as added Dec. 31, 1970 , Pub. L. 91–604, § 11(a)(1) , 84 Stat. 1704 , which related to enforcement of aircraft emission standards, was transferred to section 7572 of this title . Section 1857f–11, act July 14, 1955, ch. 360, title II, § 233, as added Dec. 31, 1970 , Pub. L. 91–604, § 11(a)(1) , 84 Stat. 1704 , which related to State standards and controls regarding aircraft emissions, was transferred to section 7573 of this title . Section 1857f–12, act July 14, 1955, ch. 360, title II, § 234, as added Dec. 31, 1970 , Pub. L. 91–604, § 11(a)(1) , 84 Stat. 1705 , related to definitions concerning aircraft emissions standards, was transferred to section 7574 of this title .