The purpose of this legislation is to officially designate the Grand Village of the Natchez Indians and Historic Jefferson College in Natchez, Mississippi, as affiliated areas of the National Park System. This designation aims to promote public appreciation of the historical significance of these sites and ensure their preservation. Key provisions of the legislation include the establishment of the Grand Village of the Natchez Indians as an affiliated area immediately, while Historic Jefferson College will be designated as such once it meets specific criteria set by the National Park Service.