S.C. Code Regs. § § 123-11
The use of watercraft will be restricted in the waters in the Garden City Canal, in the Murrels Inlet Area, of Georgetown County and Horry County, S.C. The Garden City Canal begins at a point on Main Creek (near the Mouth of Murrells Inlet), runs parallel to the Atlantic Ocean to a point on the highway and causeway from the mainland to Garden City (S.C. Highway Number 26-51), and runs parallel to such highway and causeway to a point on Main Creek near the bridge of S.C. Highway Number 26-51.
No person shall water ski or ride on a surfboard or similar object in the Garden City Canal except during the time of each day from one and one-half (1 1/2) hours before and after the mean high tide of the Garden City Canal. There shall not be any water skiing on any such object outside of the wake of the boat pulling the water skier.
The regulated areas of Garden City Canal shall be identified by appropriate signs and markers. The signs and markers shall conform to the system of aids to navigation prescribed by the U.S. Coast Guard and to the system of uniform waterway markers approved by the advisory panel of State officials to the Merchant Marine Council, U.S. Coast Guard, in October 1961.
S.C. Code Regs. § 123-11