S.C. Code Ann. § 55-11-390: Obligations not to be impaired.

So long as the district shall be indebted to any person, firm or corporation on any bonds, notes, or other obligations issued pursuant to the authority of this article, provisions of this article and the powers granted to the district and the commission shall not be in any way diminished and the provisions of this article shall be deemed a part of the contract between the district and the holders of such obligations.