S.C. Code § 5-15-80
The results of any political party primary shall be declared by the party conducting the election. Protests and contests shall be filed in writing with the municipal party chairman within two days after the day of the declaration of the results of the election and the municipal party executive committee shall determine such protests within five days after the filing thereof. From the decision of the municipal party committee an appeal may be made to the Board of State Canvassers of Municipal Primaries as provided in Section 7-17-580. Notice and grounds of appeal must be filed in writing with the chairman of the Board of State Canvassers of Municipal Primaries within five days following the date on which the decision of the municipal committee is declared.
Any appeal thereafter shall be to the court of common pleas of the county in which the municipality is situate. Notice and grounds of appeal shall be served on the opposing parties or their attorneys within ten days following the decision of the Board of State Canvassers of Municipal Primaries.
S.C. Code § 5-15-80