CFR›Title 43›Subtitle B›Chapter II›Part 3620 ContainsSubpart 3622CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 3620—FREE USE OF PETRIFIED WOOD Subparts 3622 Subpart 3622—Free Use of Petrified Wood Sections 3622.1–3622.4 Authority30 U.S.C. 601 et seq.; 43 U.S.C. 1201, 1732, 1733, 1740; Sec. 2, Act of September 28, 1962 (Pub. L. 87-713, 76 Stat. 652).Source48 FR 27015, June 10, 1983, unless otherwise noted. Previous 3600 Part 3600—Mineral Materials Disposal Next 3710 Part 3710—Public Law 167; Act of July 23, 1955