S.C. Code Ann. § 50-21-80
Any person employed or elected by this State or political subdivision thereof, whose duty it is to preserve the peace or to make arrests or to enforce the law, including, but not limited to, members of the sheriff's departments, state police, enforcement officers, or deputies or other qualified persons may, upon recommendation of the appropriate agency, be empowered to enforce the provisions of this chapter. The department shall be primarily responsible for enforcement of this chapter and rules and regulations issued thereunder. Any such person shall also have the authority to stop and board any vessel subject to the provisions of this chapter or to any rule or regulation for the purpose of inspection or determining compliance with the provisions of this chapter and is empowered to issue a summons for appearance in court or before a magistrate or make arrest for violations of this chapter or of the rules and regulations prescribed thereunder. Every vessel subject to this chapter if underway and upon being hailed by a designated law-enforcement officer shall stop immediately and lay to, or shall maneuver in such a way as to permit such officer to come aboard.