Notwithstanding any acreage or boundary limitations contained in this Act with respect to the Cape Krusenstern National Monument, the Bering Land Bridge National Preserve, the Yukon-Charley Rivers National Preserve, and the Kobuk Valley National Park, the Secretary may designate Federal lands or he may acquire by purchase with the consent of the owner, donation, or exchange any significant archeological or paleontological site in Alaska located outside of the boundaries of such areas and containing resources which are closely associated with any such area. If any such site is so designated or acquired, it shall be included in and managed as part of such area. Not more than seven thousand five hundred acres of land may be designated or acquired under this section for inclusion in any single area. Before designation or acquisition of any property in excess of one hundred acres under the provisions of this section, the Secretary shall—