S.C. Code § 12-37-3140
2007 Act No. 57, Section 7.D, provides as follows:
"Notwithstanding the general effective date of this act [June 6, 2007], this section takes effect upon ratification of an amendment to the Constitution of this State proposed pursuant to Joint Resolution 402 of 2006 [ratified April 26, 2007] and applies for property tax years beginning after 2006."
2010 Act No. 275, Section 3, provides as follows:
"This act takes effect upon approval by the Governor, and shall apply to real property transfers after 2009. No refund is allowed on account of values adjusted by the changes to the provisions of Section 12-37-3150."