CFR›Title 7›Subtitle B›Chapter V›Part 500 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 PART 500—NATIONAL ARBORETUM Subparts A Subpart A—Conduct on U.S. National Arboreturm Property Sections 500.1–500.15 B Subpart B—Fee Schedule for Certain Uses of National Arboretum Facilities and Grounds Sections 500.20–500.25 Authority20 U.S.C. 196(a); sub secs. 2, 4, 5; 40 U.S.C. 121(d); 40 U.S.C. 1315(c).Source70 FR 55708, Sept. 23, 2005, unless otherwise noted. Next 501 Part 501—Conduct on U.S. Meat Animal Research Center, Clay Center, Nebraska