You call the meeting by the normal means.
If the meeting is inquorate (not enough in attendance or there by virtue of proxies) the chair waits for half an hour and declares the meeting quorate under various provisions in Schedule 1 of the Act.
Eg, Section 12 (4): Chairperson may be only person present
A meeting is, subject to the provisions of this Schedule relating to the quorum, validly held even though the only person present at the meeting is the chairperson of the owners corporation.
Section 17 (4): Procedure if no quorum
If no quorum is present within the next half-hour after the relevant motion or business arises for consideration at the meeting, the chairperson must—
(a) adjourn the meeting for at least 7 days, or
(b) declare that the persons present either personally or by duly appointed proxy and who are entitled to vote on the motion or election constitute a quorum for considering that motion or business and any subsequent motion or business at the meeting.
In short, the chair waits half an hour then declares the meeting quorate. Votes on the sole non-procedural item on the agenda – allowing electronic voting – and moves on.