S.C. Code Ann. § 6-24-220

A joint agency may provide by resolution for the issuance of refunding bonds of the joint agency for the purpose of refunding outstanding bonds issued pursuant to this chapter, including the payment of a redemption premium on them and interest accrued to the date of their redemption. The refund of outstanding bonds may be exercised as considered desirable by the board of the joint agency. The issuance of the bonds, their maturities and other terms, the rights of their holders, and the rights, duties, and obligations of the joint agency in respect to the bonds must be governed by the provisions of this chapter relating to the issuance of bonds to the extent those provisions apply.