The property referred to in paragraph (2) shall be included within the park only if the Secretary of the Interior (hereinafter in this subchapter referred to as the Secretary) determines that the historic resources of Fort Rosalie are of sufficient national significance and integrity to warrant inclusion in the National Park System. The Secretary shall make such determination after receiving from the Governor of the State of Mississippi and the mayor of the city of Natchez, in consultation with the State Historic Preservation Officer, a recommendation based on scholarly research as to the national significance and integrity of such historic resources.