S.C. Code § 12-6-3385
2006 Act No. 386, Section 11.B, provides as follows:
"This section takes effect upon approval by the Governor and applies to qualifying students required to withdraw from a qualifying institution to serve on active military duty on or after January 1, 2000."
2017 Act No. 40, Section 18.B, provides as follows:
"B. This SECTION takes effect upon approval by the Governor and applies to tax years beginning after 2017."