CFR›Title 50›Chapter I›Part 25›Subpart B ContainsSections 25.21–25.24CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart B—Administrative Provisions Sections 25.21 § 25.21 When and how do we open and close areas of the National Wildlife Refuge System to public access and use or continue a use? 25.22 § 25.22 Lost and found articles. 25.23 § 25.23 Information collection requirements. 25.24 § 25.24 Drain tile setbacks. Previous A Subpart A—Introduction Next C Subpart C—Public Notice