CFR›Title 50›Chapter I›Part 17›Subpart E ContainsSections 17.50–17.52CorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 Subpart E—Similarity of Appearance Sections 17.50 § 17.50 General. 17.51 § 17.51 Treatment as endangered or threatened. 17.52 § 17.52 Permits—similarity of appearance. Source42 FR 32377, June 24, 1977, unless otherwise noted. Previous D Subpart D—Threatened Wildlife Next F Subpart F—Endangered Plants