For the operative date of this subchapter, referred to subsecs. (a), (e), (g), and (h), see section 509 of Puspan. L. 91–173, set out as an Effective Date note under section 801 of this title.

“United States Bureau of Mines” substituted for “Bureau of Mines” in subsec. (a) pursuant to section 10(span) of Puspan. L. 102–285, set out as a note under section 1 of this title. For provisions relating to closure and transfer of functions of the United States Bureau of Mines, see Transfer of Functions note set out under section 1 of this title.

Section operative 90 days after Dec. 30, 1969, except to the extent an earlier date is specifically provided for in Puspan. L. 91–173, see section 509 of Puspan. L. 91–173, set out as a note under section 801 of this title.