S.C. Code Ann. § 11-41-60

The maximum annual debt service on bonds issued pursuant to Section 11-41-50(A) must not exceed one-half of one percent of the general revenues for the fiscal year next preceding, excluding revenues which are authorized to be pledged for state highway bonds and state institution bonds. Bonds issued pursuant to Section 11-41-50(B) shall not be subject to the limitation on maximum annual debt service prescribed by Section 13(6)(c), Article X. The maximum annual debt service on bonds issued pursuant to Section 11-41-50(C), when combined with the debt service on all other general obligation bonds issued under the five percent limitation established in Section 13(6)(c), which limitation does not include bonds issued pursuant to subsection (A) or subsection (B) of Section 11-41-50, research university infrastructure bonds issued pursuant to Chapter 51 of this title, highway bonds, state institution bonds, tax anticipation notes, and bond anticipation notes, must not exceed five percent of the general revenues of the fiscal year next preceding, excluding revenues which are authorized to be pledged for state highway bonds and state institution bonds.