S.C. Code Ann. § 61-4-220

A restaurant with a Class A or B license issued by the Department of Health and Environmental Control (DHEC) may serve food or beverages at its adjoining facilities located outside the restaurant if the food is prepared in a kitchen of the restaurant which is subject to inspection by DHEC and is placed on individual plates or in individual serving dishes inside the restaurant, and if uncovered containers in which the beverages are served are filled only to satisfy the order of a customer.