S.C. Code § 33-49-430
Five percent of all members present in person shall constitute a quorum for the transaction of business at all meetings of the members unless the bylaws prescribe the presence of a greater percentage of the members for a quorum. If less than a quorum is present at any meeting a majority of those present in person may adjourn the meeting from time to time without further notice. A vote cast by a member at an early voting site counts for purposes of determining the presence of a quorum at the meeting where the election is to be held. Voting by proxy for any purpose is prohibited.
S.C. Code § 33-49-430
2019 Act No. 56, Section 16, provides as follows:
"SECTION 16. Where the provisions of new or revised 1976 Code sections or subsections contained in this act conflict with provisions of the bylaws of an electric cooperative, the provisions of this act control and the cooperative, as permitted by Section 33-49-280, shall amend and conform its bylaw provisions accordingly."