S.C. Code § 11-17-20
Any borrower, whenever authorized by general or special law, to issue bonds, may, pending the sale and issuance thereof, but within the limitations set forth in Section 11-17-60 of this chapter, borrow in anticipation of the receipt of the proceeds of bonds from any person, and evidence the debt by a note duly executed by the officers of the borrower authorized by the governing body of the borrower. The note shall be expressed to mature not later than one year from the date of its issuance except that if the note is issued in anticipation of the sale of bonds payable solely from a revenue-producing facility and there is in existence an agreement between the borrower and any federal agency pursuant to which such bonds are to be purchased by such federal agency, such note may be expressed to mature not later than three years from its date; such note may, but shall not be required to, be subject to redemption prior to its stated maturity, on such terms and conditions as the governing body of the borrower may prescribe, except that the maximum premium to be paid for prior redemption shall not exceed one half of one per centum. The note shall bear such rate of interest as the governing body shall determine and shall recite on its face that it is issued in anticipation of the issuance of bonds and is payable, both as to principal and interest, from the proceeds thereof.
S.C. Code § 11-17-20