; and (B) any other applicable law; and (2) subject to such terms and conditions as the Secretary determines to be appropriate. (l) Maintenance of existing communications facilities The provisions of this Act shall not be construed to prevent— (1) the maintenance of communications facilities, in existence on the date of the enactment of this Act and located in a national conservation area; or (2) limited motorized access to such facilities when non-motorized access means are not reasonably available or when time is of the essence, subject to such conditions as the Secretary considers to be desirable. (m) Maintenance of agua caliente road In preparing resource management and travel management plans for the Lower Sonoran Field Office, the Secretary shall provide for protection of the existing, low-standard (BLM Maintenance Level 3) Agua Caliente which provides access to the wilderness and high conservation value lands designated by this Act, and shall assure that the wilderness environment and atmosphere enjoyed by users of this road, which Congress finds is well-matched to the rugged and wild character of the wilderness beyond the roadside, is not degraded by incompatible development within the road corridor or by improvement of the road itself other than as he determines necessary for public safety. 8. Acquisition of land (a) In general The Secretary may acquire non-public land within the boundaries of the National Conservation Areas, the Wilderness Areas, or the Special Management Areas established by this Act only through exchange, donation, or purchase from a willing seller. (b) Management Land acquired under this section shall— (1) become part of the National Conservation Areas, the Wilderness Areas, or the Special Management Areas involved