S.C. Code Ann. § 51-7-80: Holders of revenue obligations; additional rights.

In addition to all other rights and remedies, any holders of the revenue bonds of the Department, including their trustee or trustees, may by mandamus or other suit, action or proceeding require the Department to fix and collect such rates, charges and rentals as will be sufficient to carry out any agreement concerning, or pledge of, the revenues produced by any service or facility furnished by the Department.