S.C. Code Ann. § 59-71-90: Negotiability and registration.

The bonds issued pursuant to this article shall be in the form of negotiable coupon bonds, payable to bearer, with the privilege to the holder of having them registered as to principal on the books of the treasurer of the county wherein the operating school unit is located, in whole or in part, and the principal thus made payable to the registered holder (unless the last registered transfer shall have been to bearer) upon such conditions as the authorities may prescribe. Unless registered such bonds shall have all the qualities of negotiable instruments under the law merchant and the Uniform Commercial Code.