S.C. Code § 59-107-200
Upon the direction of the State Fiscal Accountability Authority, the State Treasurer may apply all or any part of the excess, as defined in Section 59-107-180, of the special fund established pursuant to Section 59-107-180, applicable to the state institution bonds of any state institution to the defeasance of any of such bonds by establishing an irrevocable trust therefor which shall consist of either monies in an amount which shall be sufficient, or direct obligations of the United States of America, or obligations unconditionally guaranteed by the United States of America, the principal and interest on which when due will provide the sums required to pay the principal, interest, and redemption premium, if any, of the particular state institution bonds sought to be defeased. The trust fund shall be established in such manner as to designate the state institution bonds intended to be defeased. When so established, the state institution bonds shall be deemed to be defeased and shall not be deemed to be outstanding for all purposes of this chapter. Notwithstanding the establishment of the irrevocable trust fund, the obligation of the State to pay to the holders of the defeased bonds all sums due by way of principal and interest shall not be deemed to be impaired.
The General Assembly is mindful of the fact that the law in effect at the time of the issuance of any state institution bonds is a part of the contract between the State and the holders of such bonds.
It is not intended that Sections 59-107-50, 59-107-90, 59-107-180 and 59-107-200 shall impair or modify the contract existing between the State and the holders of state institution bonds now outstanding. Accordingly, the use of surplus money in the sinking funds established by Section 59-107-180 for capital improvements shall not be undertaken until all bonds outstanding on May 11, 1976 have been paid or provision for their payment has been made. It is further prescribed that in the event of a deficiency in revenues required to pay the principal or interest of any state institution bonds outstanding on May 11, 1976, resort may be had by the holders of such bonds to any special trust established to defease other state institution bonds outstanding on May 11, 1976 and, in which event, it shall become the duty of the trustees, Area Commissions, or the State Board for Technical and Comprehensive Education of the applicable state institutions to increase tuition fees to the extent necessary to restore such special Trust Fund.
S.C. Code § 59-107-200