S.C. Code Ann. § 50-5-710
(A) Except as otherwise provided, it is lawful to trawl for shrimp or prawn in the General Trawling Zone only during those times and seasons set by the department. Any person who violates this subsection by trawling inside the General Trawling Zone:
(B) Except as otherwise provided, it is unlawful to trawl in the waters of this State outside the General Trawling Zone. Any person who violates this subsection by trawling outside the General Trawling Zone:
(4) one-half nautical mile distance or greater from the nearest point of the General Trawling Zone boundary is guilty of a misdemeanor and, upon conviction, must be fined five thousand dollars or imprisoned for not more than thirty days and must have his saltwater privileges suspended for two years in addition to any other suspension under this chapter.
Any catch aboard or under the control of the fisherman or other person at the time of a violation of this subsection is contraband and must be seized and disposed of as provided in this chapter.