S.C. Code Ann. § 37-1-108

(1) This title prescribes maximum charges for all creditors, except lessors and those excluded (Section 37-1-202), extending consumer credit including consumer credit sales (Section 37-2-104), and consumer loans (Section 37-3-104), and displaces existing limitations on the powers of those creditors based on maximum charges. (2) With respect to sellers of goods or services, lenders licensed under this title, consumer and sales finance companies, industrial banks and loan companies, and commercial banks and trust companies, this title displaces existing limitations on their powers based solely on amount or duration of credit. (3) Except as provided in subsection (1), this title does not displace limitations on powers of credit unions, savings banks, savings and loan associations, or other thrift institutions or insurance premium service companies whether organized for the profit of shareholders or as mutual organizations. (4) Except as provided in subsections (1) and (2), this title does not displace: (a) limitations on powers of supervised financial organizations (subsection (27) of Section 37-1-301) with respect to the amount of a loan to a single borrower, the ratio of a loan to the value of collateral, the duration of a loan secured by an interest in land, or other similar restrictions designed to protect deposits, or (b) limitations on powers an organization is authorized to exercise under the laws of this State or the United States.