Section was formerly classified to section 566 of the former Appendix to this title prior to editorial reclassification and renumbering as this section.

A prior section 506 of act Oct. 17, 1940, ch. 888, art. V, 54 Stat. 1188; Pub. L. 102–12, § 9(21), Mar. 18, 1991, 105 Stat. 41, related to mineral permits and leases and the suspension of operations and term of permits and leases, prior to the general amendment of this Act by Pub. L. 108–189. See section 3995 of this title.

Section applicable to any case not final before Dec. 19, 2003, see section 3 of Pub. L. 108–189, set out as a note under section 3901 of this title.