The park shall consist of a historic zone, including the Marsh-Billings-Rockefeller Mansion, surrounding buildings and a portion of the area known as “Mt. Tom”, comprising approximately 555 acres, and a protection zone, including the areas presently occupied by the Billings Farm and Museum, comprising approximately 88 acres, all as generally depicted on the map entitled “Marsh-Billings-Rockefeller National Historical Park Boundary Map” and dated November 19, 1991.

The map referred to in paragraph (1) shall be on file and available for public inspection in the appropriate offices of the National Park Service, Department of the Interior.