S.C. Code Ann. § 15-9-420

Service of any process in any action or proceeding against any circus or other traveling show exhibiting under canvas or outdoors for gain may be made upon any clerk of court appointed agent or attorney of such show under the provisions of SECTION 52-1-60 and such service must be in duplicate. When so made it shall be deemed sufficient service upon any such circus or traveling show. When legal process against any such circus or show is served upon any such clerk of court he shall forthwith forward by certified mail one of the duplicate copies prepaid directed to the person and the address as furnished him in the power of attorney referred to in SECTION 52-1-60.