CFR›Title 50›Chapter V›Part 520 ContainsSections 520.1–520.7CorpusDaily eCFRDisplayed edition2026-05-08Last updated2026-05-08 PART 520—PUBLIC AVAILABILITY OF AGENCY MATERIALS Sections 520.1 § 520.1 Purpose. 520.2 § 520.2 Scope. 520.3 § 520.3 Definitions. 520.4 § 520.4 Availability of materials. 520.5 § 520.5 Administrative appeal. 520.6 § 520.6 Extensions of time. 520.7 § 520.7 Fees. Authority5 U.S.C. 552.Source41 FR 3307, Jan. 22, 1976, unless otherwise noted. Previous 510 Part 510—Implementation of the Federal Advisory Committee Act Next 530 Part 530—Compliance with the National Environmental Policy Act