43 C.F.R. § 421.13 Closing of areas.
Title 43 - Public Lands: Interior
The Project Manager may establish a reasonable schedule of visiting hours for all or portions of the area. He may close or restrict the public use of all or any portion of the property when necessary for protection of the property or the safety and welfare of persons. All persons shall obey signs designating closed areas and visiting hours.
Title 43: Public Lands: Interior
PART 421—RULES OF CONDUCT AT HOOVER DAM
§ 421.13 Closing of areas.