South Carolina Code 7-11-30. Convention nomination of candidates
(1) there is a three-fourths vote of the total membership of the convention to use the convention nomination process; and
(2) a majority of voters in that party’s next primary election approve the use of the convention nomination process.
(B) A party may not choose to nominate by party convention for an election cycle in which the filing period for candidates has begun.
(C) A political party nominating candidates by party convention shall nominate the party candidates and make the nominations public not later than the time for certifying candidates to the authority charged by law with preparing ballots for the general or special election.
(D) Nothing in this section requires a political party that has nominated candidates by convention in the previous election cycle to hold a primary in order to continue using the convention method to nominate candidates.