S.C. Code Ann. § 11-21-50

The governing board shall not be required to effect the payment or redemption of the outstanding bonds through the means of any optional redemption provision and it may provide in the agreement required by SECTION 11-21-60 that the proceeds of the refunding bonds be used for the payment of the outstanding bonds as and when the same mature. Whenever refunding bonds are issued pursuant to this chapter, the public agency issuing such bonds shall give published notice in a financial paper published in the City of New York of the purpose for which the proceeds of the refunding bonds will be used.