; or (iii) limit actions taken to modernize, upgrade, or carry out other changes to such projects authorized pursuant to clause (i), subject to written determination by the Secretary of the Interior that the changes are consistent with the purposes of the designation. (5) Land management (A) Zoning ordinances For the purpose of the segments designated by section 3(a)(213) of such Act ( 16 U.S.C. 1274(a) ), the zoning ordinances adopted by the municipalities named in subsection 3(A)(ii), including provisions for conservation of floodplains, wetlands, and watercourses associated with the segments, shall be deemed to satisfy the standards and requirements of section 6(c) of such Act ( 16 U.S.C. 1277(c) ). (B) Acquisitions of lands The authority of the Secretary to acquire land for the purposes of the segments designated by section 3(a)(213) of such Act ( 16 U.S.C. 1274(a) ) shall be— (i) limited to acquisition by donation or acquisition with the consent of the owner of the land; and (ii) subject to the additional criteria set forth in the management plan. (C) No condemnation No land or interest in land within the boundary of the river segments designated by section 3(a)(213) of such Act ( 16 U.S.C. 1274(a) ) may be acquired by condemnation. (6) Relation to the National Park System Notwithstanding section 10(c) of such Act ( 16 U.S.C. 1281(c) ), each segment of the Nashua, Squannacook, and Nissitissit Rivers designated as a component of the Wild and Scenic Rivers System under this Act shall not— (A) be administered as a unit of the National Park System; or (B) be subject to regulations that govern the National Park System.