S.C. Code Ann. § 47-3-720

No person owning or harboring or having the care or the custody of a dangerous animal may permit the animal to go unconfined on his premises. A dangerous animal is "unconfined" as used in this section if the animal is not confined securely indoors or confined in a securely enclosed fence or securely enclosed and locked pen or run area upon the person's premises. The pen or run area must be clearly marked as containing a dangerous animal and must be designed to prevent the entry of the general public, including children, and to prevent the escape or release of the animal. However, this section does not apply to an animal owned by a licensed security company and on patrol in a confined area.