The main purpose of this legislation is to change the boundaries of the Vicksburg National Military Park in Mississippi. It aims to allow the state to take control of certain federal lands within the park for public use, specifically for a welcome center and an interpretive center or museum. Key provisions of the legislation include the transfer of approximately 3.66 acres of land to be used as a welcome center and about 6.48 acres to be developed into an interpretive center or museum.