S.C. Code § 58-34-20
Within five calendar days after the effective date of this chapter, the Public Service Commission, by order, is directed to exercise its authority pursuant to Section 58-27-870(F) to provide an experimental rate that customers of the utility identified in Section 58-34-10 shall pay during the pendency of litigation currently before the commission which shall include full and final compliance by the utility with the order issued by the Public Service Commission under this section or until replaced by an order of the commission under Section 58-34-30. This experimental rate shall cause rates to be reduced on a going forward basis in an amount equal to the electric utility rates these ratepayers are paying reduced by the following rate increases imposed under the provisions of the Base Load Review Act in the Public Service Commission's orders Docket No. 2011-207-E, Order No. 2011-738, Docket No. 2012-186-E, Order No. 2012-761, Docket No. 2013-150-E, Order No. 2013-680(A), Docket No. 2014-187-E, Order No. 2014-785, Docket No. 2015-160-E, Order No. 2015-712, Docket No. 2016-224-E, Order No. 2016-758, for the period of no earlier than April 1, 2018, until the issuance of the Public Service Commission's final order on the merits on the matters before the commission.
S.C. Code § 58-34-20
2018 Act No. 258, Section 12, provides as follows:
"SECTION 12. This act takes effect upon approval by the Governor and applies to all cases, proceedings, petitions, or matters pending before the Public Service Commission or in any other court or venue on or after the effective date of this act."