36 C.F.R. § 261.53 Special closures.
Title 36 - Parks, Forests, and Public Property
When provided in an order, it is prohibited to go into or be upon any area which is closed for the protection of: (a) Threatened, endangered, rare, unique, or vanishing species of plants, animals, birds or fish. (b) Special biological communities. (c) Objects or areas of historical, archeological, geological, or paleontological interest. (d) Scientific experiments or investigations. (e) Public health or safety. (f) Property.
Title 36: Parks, Forests, and Public Property
PART 261—PROHIBITIONS
Subpart B—Prohibitions in Areas Designated by Order
§ 261.53 Special closures.