S.C. Code Ann. § 11-41-130

For the payment of the principal and interest on all bonds issued and outstanding pursuant to this chapter there is pledged the full faith, credit, and taxing power of this State, and in accordance with the provisions of Section 13(4), Article X of the Constitution of this State, 1895, the General Assembly allocates on an annual basis sufficient tax revenues to provide for the punctual payment of the principal and interest on the debt authorized by this chapter.