S.C. Code Ann. § 34-33-10: "Banker's bank" defined.

As used in this chapter, "banker's bank" means a bank insured by the Federal Deposit Insurance Corporation or the holding company which owns or controls such an insured bank where the stock of the bank or holding company is owned exclusively by other banks and the bank or holding company and all its subsidiaries are engaged exclusively in providing services for other depository institutions, their officers, directors, and employees.