S.C. Code Ann. § 59-146-120

For the payment of the principal and interest on all state school facilities bonds issued and outstanding pursuant to this chapter there is pledged the full faith, credit, and taxing power of the State of South Carolina, and in accordance with the provisions of paragraph (4) of Section 13 of Article X of the South Carolina Constitution, the General Assembly hereby 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.