S.C. Code Ann. § 6-24-180

A holder of bonds issued pursuant to this chapter and the trustee pursuant to a trust agreement, except to the extent the rights are restricted by the trust agreement or the resolution authorizing the issuance of the bonds, may protect and enforce, either at law or in equity, by suit, action, mandamus, or other proceeding, all rights and compel performance of all duties arising out of the law of the State or terms of the trust agreement or resolution or other contract.