As used in this chapter:
(a) "Closure" means the imposition of restrictions on, or prohibition of, designated activities within a defined area under the authority of W.S. 35-9-301.
(b) "Unimproved areas" means cropland, agricultural land, and undeveloped land which predominately remains in its natural forested or range condition.
060-9 Wyo. Code R. § 9-2