; (vi) conveyance distribution systems; (vii) water treatment facilities; (viii) aqueducts; (ix) canals; (x) ditches; (xi) pipelines; (xii) wells; (xiii) hydropower projects; (xiv) transmission facilities; and (xv) other ancillary facilities, groundwater recharge facilities, water conservation, water filtration plants, and other water diversion, conservation, groundwater recharge, storage, and carriage structures. (2) Boundaries Not later than 3 years after the date of enactment of this subsection, the Secretary shall update the general management plan for the recreation area developed under subsection (t) to reflect the boundaries designated on the map referred to in subsection (c)(1) to include the area known as the Rim of the Valley Unit . (3) Administration Subject to valid existing rights, the Secretary shall administer the Unit and any land or interest in land acquired by the United States located within the boundaries of the Unit— (A) as part of the recreation area; and (B) in accordance with— (i) this section; and (ii) applicable laws (including regulations). (4) Acquisition of land (A) In general The Secretary may acquire non-Federal land within the boundaries of the Unit only through exchange, donation, or purchase from a willing seller. (B) Use of eminent domain Nothing in this subsection authorizes the use of eminent domain to acquire land or interests in land within the boundaries of the Unit. (5) Outside activities The fact that certain activities or land uses can be seen or heard from within the Unit shall not preclude the activities or land uses outside the boundary of the Unit. (6) Effect of subsection Nothing in this subsection or the application of the applicable management plan to the Unit— (A) modifies any provision of Federal, State, or local law with respect to public access to, or use of, non-Federal land