S.C. Code Ann. § 9-3-150

(1) The Governor is empowered to authorize a referendum, and to designate any agency or individual to supervise its conduct, in accordance with the requirements of Section 218 (d) (3) of the Social Security Act, on the question of whether service in positions covered by a retirement system, other than the South Carolina Retirement System established by the State or by a political subdivision thereof, should be excluded from or included under the agreement provided for in Sections 9-3-110 and 9-3-120. The notice of the referendum required in Section 218 (d) (3) (C) of the Social Security Act to be given to employees shall contain or shall be accompanied by a statement, in such form and such detail as the agency or individual designated to supervise the referendum shall deem necessary and sufficient, to inform the employees of the rights which will accrue to them and their dependents and survivors, and the liability to which they will be subject, if their services are included under the agreement provided for in Sections 9-3-110 and 9-3-120. (2) Upon receiving evidence satisfactory to him that with respect to any such referendum the conditions specified in Section 218 (d) (3) of the Social Security Act have been met, the Governor shall so certify to the Secretary of Health, Education and Welfare.