S.C. Code Ann. § 11-17-100

Upon delivery of the bonds in anticipation of which a note or notes pursuant to this chapter have been issued, sufficient of the proceeds of such bonds shall be applied by the borrower to meet the payment of the principal and interest of such notes, unless the stated maturity of the notes shall be subsequent to the date as of which such bonds are issued; but, in all such instances, upon the delivery of the bonds, sufficient of the proceeds thereof shall be deposited in an irrevocable trust with the paying agent of the notes, or other financial institution, for the payment of the principal and interest of the notes upon their stated maturity.