S.C. Code Ann. § 7-13-1820: Persons within guard rail; time permitted voters to vote.

After the opening of the polls, the managers of election shall not permit any voter or other person to pass within the guard rail until they ascertain that he or she is entitled to vote, in the manner required by Section 7-13-710, as the case may be, and only one voter at a time for each voting machine at the voting place shall be permitted to pass within or be within the guard rail to vote. No voter shall remain within the voting machine booth longer than three minutes, and if he shall refuse to leave it after the lapse of three minutes, he may be removed by the managers.