S.C. Code § 54-15-10
Subject to Section 8501 of Title 46 of the United States Code, the South Carolina Commissioners of Pilotage for the Upper Coastal Area shall have jurisdiction over and shall regulate pilotage for the bars and harbors of South Carolina beginning at Little River, which is a boundary between South Carolina and North Carolina, to Cape Romain; the South Carolina Commissioners of Pilotage for the Lower Coastal Areas shall have jurisdiction over and shall regulate pilotage from Cape Romain to the South Carolina side of the Savannah River, which is a boundary between South Carolina and Georgia. Any bars, harbors, or ports that lie on or within these boundaries shall be subject to the aforementioned regulatory jurisdiction, but in consideration of the physical exigencies of each port, the commissioners having jurisdiction shall promulgate separate regulations for such respective ports.
S.C. Code § 54-15-10