S.C. Code Ann. § 34-28-800
(4) Except as otherwise provided in subsection (2), for the purpose of this section and any other law of this State prohibiting, limiting, or regulating the doing of business in this State by foreign associations or foreign corporations of any type, any federal association the principal office of which is located outside this State, and any foreign association which is subject to state or federal supervision which by law are subject to periodic examination by these supervisory authorities and to a requirement of periodic audit, are not considered to be doing business in this State by reason of engaging in any of the following activities: