15.20.—(1) A meeting is not competent to act unless a quorum is in attendance.
(2) A quorum is—
(a)in the case of a meeting of creditors, at least one creditor entitled to vote; and
(b)in the case of a meeting of contributories, at least two contributories entitled to vote, or all the contributories, if their number does not exceed two.
(3) Where the provisions of this rule as to quorum are satisfied by the attendance of the chair alone or the chair and one additional person, but the chair is aware, either by virtue of proofs and proxies received or otherwise, that one or more additional persons would, if attending, be entitled to vote, the chair must delay the start of the meeting by at least 15 minutes after the appointed time.