Section was formerly classified to section 564 of the former Appendix to this title prior to editorial reclassification and renumbering as this section.

A prior section 504 of act Oct. 17, 1940, ch. 888, art. V, 54 Stat. 1187; Pub. L. 102–12, § 9(19), Mar. 18, 1991, 105 Stat. 40, related to desert-land entries and the suspension of requirements, prior to the general amendment of this Act by Pub. L. 108–189. See section 3993 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.