Ste. Genevieve National Historical Park Boundary Revision Act This bill revises the boundary of the Ste. Genevieve National Historical Park in Missouri. The Department of the Interior may acquire, by donation, the land (including any improvements to the land) owned by the city of Ste. Genevieve, Missouri, and used as the visitor center for the park, as generally identified on the revised map of the park. Upon acquisition of such land, Interior shall revise the boundary of the park to include the acquired land. Interior may acquire, by purchase from a willing seller or by donation, not more than 20 acres of land in the vicinity of the park for administrative facilities for the park.