Section was enacted as part of the Black Lung Benefits Reform Act of 1977, and not as part of the Federal Mine Safety and Health Act of 1977 which comprises this chapter or the Black Lung Benefits Act which comprises this subchapter.

Section effective Mar. 1, 1978, see section 20(a) of Pub. L. 95–239, set out as an Effective Date of 1978 Amendment note under section 901 of this title.