S.C. Code Regs. § § 103-830.1
Upon written agreement by all the parties in a docket, service of filings made in a docket at the commission may be made through e-mail or electronic service.
Upon a notice of appearance by a party in a docket or, in the case of an intervenor, the filing of a Petition to Intervene, service of filings made in a docket at the Commission shall be made through email or electronic service. The appearance of a party, or the filing of a Petition to Intervene in the docket evidences the consent of the party or Intervenor to accept service by email or electronic service. The notice of appearance filed by the party or Intervenor shall include an email address to receive electronic service of filings. If a party does not have the ability for electronic service, the party shall be served by traditional means.
S.C. Code Regs. § 103-830.1