S.C. Code § 31-10-150
Prior to issuing any bonds under this chapter, a commission shall publish notice in a newspaper of general circulation in the municipality of its intent to issue such bonds specifying the approximate date and amount of such bonds, the provisions for securing such bonds and the proposed use of the proceeds from such bonds. Any interested person may within twenty days after the publication of such notice, but not thereafter, challenge the proposal of the commission to issue such bonds by action initiated in the circuit court for the circuit in which the commission is located. If no such action is initiated the bonds, if and when issued, shall be conclusively presumed to be valid and binding in accordance with the terms thereof; provided, nevertheless, that such bonds must be issued not later than six months after publication of such notice.
S.C. Code § 31-10-150