S.C. Code Ann. § 27-31-410

As used in this chapter, "conversion of rental units to condominium ownership" means the establishment of a horizontal property regime encompassing a preexisting building which, at anytime prior to the recording of the master deed or master lease, was wholly or partially occupied by persons as their residence on a permanent or at least a continuing basis other than persons who, at the time of such recording, had contractual rights to acquire condominium ownership within the building.