S.C. Code Ann. § 5-31-30

Whenever any city or town in this State had prior to February 7 1927 issued bonds for the acquisition, by construction, purchase or otherwise, of any waterworks, lighting plant or other public utility and sells such utility prior to the maturity of such bonds, the governing body of such city or town may invest an amount of the proceeds of sale of such utility equal to the amount of outstanding bonds in duly secured notes of the purchaser of such utility or otherwise, as the governing body may determine. Upon any such investment being made, such governing body may, by resolution, set apart such investment as a sinking fund for the retirement of such outstanding bonds and when such investment is so made and set apart any other sinking funds on hand for the retirement of such bonds shall become freed of their character as sinking funds and may be lawfully diverted to any other legal municipal purpose; and no further annual tax levy for the repayment of such bonds shall be necessary.