; or (iii) limit actions taken to modernize, upgrade, or carry out other changes to a project described in clause (i), subject to a written determination by the Secretary that the changes are consistent with the purposes of the designation. (6) Land management (A) Zoning ordinances For the purpose of the segments designated by paragraph (214) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)), a zoning ordinance adopted by a town described in paragraph (4)(A)(ii), including provisions for conservation of floodplains, wetlands, and watercourses associated with the segments, shall be considered to satisfy the requirements of section 6(c) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1277(c) ). (B) Acquisition of land The authority of the Secretary to acquire land or an interest in land for the purposes of the segments designated by paragraph (214) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)) shall be— (i) limited to acquisition— (I) by donation; or (II) with the consent of the owner of the land; and (ii) subject to the additional criteria described in the management plan. (C) No condemnation No land or interest in land within the boundary of the segments designated by paragraph (214) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)) may be acquired by condemnation. (7) Relation to the National Park System Notwithstanding section 10(c) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1281(c) ), each segment designated by paragraph (214) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by subsection (a)) shall not be— (A) administered as a unit of the National Park System; or (B) subject to regulations that apply to units of the National Park System.