S.C. Code Ann. § 33-7-250: Quorum and voting requirements for voting groups.

(a) Shares entitled to vote as a separate voting group may take action on a matter at a meeting only if a quorum of those shares exists with respect to that matter. Unless the articles of incorporation or Chapters 1 through 20 of this Title provides otherwise, a majority of the votes entitled to be cast on the matter by the voting group constitutes a quorum of that voting group for action on that matter.

(b) Once a share is represented for any purpose at a meeting, it is considered present for quorum purposes for the remainder of the meeting and for any adjournment of that meeting unless a new record date is or must be set for that adjourned meeting.

(c) If a quorum exists, action on a matter (other than the election of directors) by a voting group is approved if the votes cast within the voting group favoring the action exceed the votes cast opposing the action, unless the articles of incorporation or Chapters 1 through 20 of this Title requires a greater number of affirmative votes.

(d) An amendment of the articles of incorporation adding, changing, or deleting a quorum or voting requirement for a voting group greater than specified in subsection (a) or (c) is governed by Section 33-7-270.

(e) The election of directors is governed by Section 33-7-280.