S.C. Code § 12-6-3775
2019 Act No. 77, Sections 4.B, 5, provide as follows:
"B. Upon approval by the Governor, this SECTION takes effect in income tax years beginning after 2018. The provisions of this SECTION are repealed on December 31, 2021, except that if the credit allowed by Section 12-6-3775, as added by this SECTION, is earned before the repeal, then the provisions of Section 12-6-3775 continue to apply until the credits have been fully claimed.
"SECTION 5. This act takes effect upon approval by the Governor and first applies to credits earned and certificates issued, and the administration thereof, after 2018. Any credits earned and certificates issued, and the administration thereof, before 2019 must be claimed in accordance with the provisions of Section 12-6-3530 as it existed on December 31, 2018. However, any credits earned and certificates issued before 2019 must count toward the aggregate credit limit for all taxpayers in all calendar years set forth in Section 12-6-3530(B)."
2022 Act No. 237, Sections 1, 2.B, and 7 provide as follows:
"SECTION 1.A. Section 12-6-3775 as it existed on December 31, 2021, is reenacted retroactively, subject to the amendments contained in SECTION 2.
"B. This SECTION takes effect upon approval by the Governor and applies to income tax years beginning after 2021.
"C. Section 4 B. of Act 77 of 2019 is repealed."
"[SECTION 2.]B. This SECTION takes effect upon approval by the Governor and first applies to income tax years beginning after 2021."
"SECTION 7. (A) Except as otherwise provided, this act takes effect upon approval by the Governor.
"(B)(1) If a solar energy tax credit is earned and any portion taken pursuant to Section 12-6-3775 before 2022, then the provisions of Section 12-6-3775 as they existed on December 31, 2021, continue to apply to such credits until the credits have been fully claimed.
"(2) If a solar energy tax credit is earned pursuant to Section 12-6-3775 after 2021, but before the effective date of this act, then the reenacted provisions of Section 12-6-3775, as amended pursuant to SECTION 2, apply.
"(C) The provisions of Section 12-6-3775 are repealed on December 31, 2024, except that if the credit allowed by Section 12-6-3775 is earned before the repeal, then the provisions of Section 12-6-3775, as amended, continue to apply until the credits have been fully claimed."