S.C. Code Ann. § 44-1-315

(A) For purposes of the section, "impacted location" means any facility issued or otherwise subject to a permit, license, or approval from the North Carolina Department of Environment and Natural Resources that has now been determined to be located within the jurisdiction of the South Carolina Department of Health and Environmental Control as a result of the amendments to Section 1-1-10, effective January 1, 2017. (B) Notwithstanding any other provision of law, the South Carolina Department of Health and Environmental Control, in issuing any environmental permit, license, or approval to an impacted location shall provide a schedule of compliance that allows the permittee a reasonable period of time to be no greater than five years to come into compliance with any South Carolina environmental rule, regulation, or standard established by the department or by law that has no corresponding rule, regulation, or standard under North Carolina law or regulation, or is more stringent than the corresponding rule, regulation, or standard established under North Carolina law or regulation. The department may include increments of progress applicable in each year of the schedule established under this subsection, and may shorten the period of compliance as necessary to prevent an imminent threat to the public health and environment. The department may extend a permittee's compliance schedule under this section beyond five years upon written application by the permittee only if the department determines that circumstances reasonably require such an extension, and the extension of time would pose no threat to public health or the environment.