The Federal Coal Mine Health and Safety Act of 1969, referred to in subsec. (a), is Pub. L. 91–173, Dec. 30, 1969, 83 Stat. 742, which was redesignated the Federal Mine Safety and Health Act of 1977 by Pub. L. 95–164, title I, § 101, Nov. 9, 1977, 91 Stat. 1290, and is classified principally to chapter 22 (§ 801 et seq.) of this title. For complete classification of this Act to the Code, see Short Title note set out under section 801 of this title and Tables.