S.C. Code Ann. § 37-3-510: Restrictions on interest in land as security.

(1) With respect to a supervised loan in which the principal is one thousand dollars or less, a lender may not contract for an interest in land as security. A security interest taken in violation of this section is void.

(2) An open-end credit agreement under which the credit limit is a minimum of five thousand dollars is exempt from this section even though one or more advances made pursuant to the agreement are less than one thousand dollars.