; or (II) the use of nonpowered hand tools; (ii) for noncommercial personal use of a reasonable quantity, as determined by the Secretary; and (iii) that results in negligible disturbance, as determined by the Secretary, of— (I) the surface of the Earth; and (II) other resources. (B) Inclusion The term casual collection includes the hobby collecting of rocks, subject to the discretion of the Secretary. (2) Casual collection allowed The Secretary may allow casual collection in the wilderness areas if the casual collection is consistent with— (A) the recreational or other wilderness purposes of the wilderness areas, as determined by the Secretary; and (B) (i) with respect to land managed by the Bureau of Land Management, the applicable resource management plan, as in existence on the date of enactment of this Act; or (ii) with respect to land managed by the Forest Service, the Manti–La Sal National Forest Plan, 1986. (h) Land acquisition and incorporation of acquired land and interests (1) Acquisition authority The Secretary may acquire land and interests in land within the boundaries of a wilderness area by donation, purchase from a willing seller, or exchange. (2) Incorporation Any land or interest in land within 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. (i) Native American cultural and religious uses Nothing in this title diminishes— (1) the rights of any Tribe