S.C. Code Ann. § 3-3-30

There has been ceded to the United States: (1) A site for a beacon to range with Charleston lighthouse and a site for a day beacon for St. Helena Sound in Beaufort County; (2) Two sites for two beacons, to serve as a range for Calibogue Sound in Beaufort County; (3) A site for a lighthouse and beacon light on the mainland at North Edisto in Charleston County; (4) A site for a lighthouse and beacon light on the north point of Hunting Island in Beaufort County; and (5) A site for a lighthouse and beacon light on or near Hilton Head in Beaufort County. None of the sites so ceded, as described in this section, exceed fifty acres in any one case and such sites shall be forever exempt from any taxes to be paid to this State. The same restrictions are attached thereto as are attached to the cession of a lot on South Island as set forth in Section 3-3-290. The cession of said sites shall not be construed to authorize their use for any other purpose than the purposes specified, nor to exclude or prevent any process, civil or criminal, issuing from the courts of this State from being served or executed within the limits thereof.