S.C. Code § 58-9-240
Nothing herein contained shall prevent any telephone utility from granting free or reduced rate service to its officers, agents, employees, attorneys, physicians or surgeons, nor to prevent any telephone utility from granting free or reduced rate service to the State of South Carolina or any municipality therein or department thereof or to charitable and eleemosynary institutions and persons engaged in charitable and eleemosynary work, nor to prevent any telephone utility from granting free or reduced rate service with the object and for the purpose of providing relief in times and cases of flood, general epidemic, pestilence or other calamitous visitation, nor any such other instance when the Commission may deem that such service is not contrary to the public interest; provided, that such free or reduced rate service shall be granted in accordance with tariffs filed by such telephone utility with the Commission and which shall be subject to regulation and revision by the Commission in the same manner as other rates of telephone utilities. The terms "officers" and "employees" as used in this section shall include furloughed, pensioned and superannuated officers and employees of any such utility.
S.C. Code § 58-9-240