§ 30.07 QUORUM.
   (A)   A majority of the actual membership of the Board of Commissioners plus the Mayor, excluding vacant seats, shall constitute a quorum. A member who has withdrawn from a meeting without being excused by majority vote of the remaining members present shall be counted as present for purposes of determining whether or not a quorum is present.
   (B)   Any member present by means of simultaneous communication in accordance with G.S. 166A-19.24 shall be counted as present for the purposes of whether a quorum is present only during the period while simultaneous communication is maintained for that member.
(G.S. § 160A-74) ('70 Code, Ch. A, Art. I, § 10)