; and (B) the guidelines set forth in Appendix A of the report of the Committee on Interior and Insular Affairs of the House of Representatives accompanying H.R. 2570 of the 101st Congress (House Report 101–405). (2) Inventory Not later than 1 year after the date of enactment of this Act, the Secretary shall conduct an inventory of existing facilities and improvements associated with grazing activities in the wilderness areas managed by the Secretary. (3) Fencing The Secretary may construct and maintain fencing around the boundaries of the wilderness areas managed by the Secretary as the Secretary determines to be appropriate to enhance wilderness values. (c) Incorporation of acquired land and interests Any land or interest in land within, or adjacent to, the boundary of a wilderness area that is acquired by the United States after the date of enactment of this Act shall be added to, and administered as part of, the wilderness area. (d) Military overflights Nothing in this title restricts or precludes— (1) low-level overflights of military aircraft over the wilderness areas, including military overflights that can be seen or heard within the wilderness areas; (2) flight testing and evaluation