Any properties of historic interest acquired under section 698 of this title shall become part of the Preserve established under . The Secretary shall administer such properties in accordance with a plan that integrates the administration and interpretation of the ecological values of the Preserve and the historical values of the sites so acquired and the historical features of Fort Caroline. Such administration and interpretation shall be conducted through the facilities and staff of Fort Caroline National Memorial consistent with ().section 698n of this titlesection 2 of the Act of September 21, 195064 Stat. 897o