CFR›Title 43›Subtitle B›Chapter I›Part 423›43 CFR Part 423 Subpart D Citation43 CFR Part 423 Subpart DContainsSection § 423.50CorpusDaily eCFRDisplayed edition2026-09-24Last updated2026-09-24 Subpart D—Authorization of Otherwise Prohibited Activities Sections § 423.50 § 423.50 How can I obtain permission for prohibited or restricted uses and activities? Authority43 U.S.C. 373a and 373b.Source73 FR 75349, Dec. 11, 2008, unless otherwise noted.