S.C. Code § 12-8-1520
2005 Act No. 145, Section 20.C, provides as follows:
"Section 12-8-1520(A)(2) of the 1976 Code, as amended in subsection A. of this section, takes effect July 1, 2005. The amendment to Section 12-8-1520 in the 1976 Code in subsection B. of this section applies for payments due after January 1, 2006."