S.C. Code Ann. § 4-12-40
Projects with a lease agreement entered into before January 1, 1996, are required to use the provisions of Section 4-29-67. Projects with lease agreements entered into after December 31, 1995, are required to use the provisions contained in this chapter. However, those projects with lease agreements entered into after December 31, 1995, in which the total investment exceeds forty-five million dollars within the time provided in subsection (C)(2), may elect to use the provisions of Section 4-29-67 or 4-12-30, but not both.
The minimum investment levels or job creation levels, or both, required in order to qualify for a fee-in-lieu of property tax as provided in Section 4-29-67 and as reduced in Section 12-10-70(2) may be used for lease agreements executed before December 31, 1995, and for any project which has received any of the required readings before county council to enact the agreement before December 31, 1995.