S.C. Code Ann. § 5-21-680: Coupons, registrations and negotiability.

Any such bonds shall be issued as coupon bonds, payable to bearer, with the privilege to the holder of having them registered on the books of the treasurer of the municipality 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 municipal council may prescribe. Unless registered such bonds shall have all the qualities of negotiable instruments under the law merchant and the Uniform Commercial Code.