S.C. Code § 12-6-3330
2017 Act No. 40, Sections 17.B, 17.C, provide as follows:
"B. Notwithstanding the increased multiplier of fifty thousand dollars in Section 12-6-3330(B)(1) as amended in this SECTION, the increase must be phased-in in six equal installments of three thousand three hundred thirty-three dollars each tax year until it is fully phased-in in tax year 2023, with the first increase occurring in tax year 2018.
"C. This SECTION takes effect upon approval by the Governor and applies to tax years beginning after 2017."