S.C. Code § 4-20-60
Before the issuance of any general obligation bonds or any revenue bonds and the levy of a tax or service charge to retire the bonds at rates different from those levied in the remainder of the county, the county council shall first approve the issuance of the general obligation bonds or the revenue bonds and the levy of the tax or service charge to retire the bonds. The levy of a tax or service charge for general obligation bonds or revenue bonds is subject to the limitation imposed by referendum on the maximum level of taxes or user service charges authorized to be levied and collected for the district.
With the approval of the governing body of the county, the district may pledge collateral and borrow by means other than bonds for the same purposes for which bonds may be issued and subject to the same limitations on repayment of general obligation or revenue bonds.
S.C. Code § 4-20-60