S.C. Code Ann. § 41-27-540: Individuals employed to assist agents or employees.

Each individual employed to perform or to assist in performing the work of any agent or employee of an employing unit shall be deemed to be employed by such employing unit for all the purposes of Chapters 27 through 41 of this Title, whether such individual was hired or paid directly by such employing unit or by such agent or employee, provided the employing unit had actual or constructive knowledge of the work.