In the ACT, perhaps elsewhere there are similar provisions, the chair of the EC is also automatically the chair for general meetings unless that person is unavailable or declines to do it. In that situation the meeting has to elect a chair from among the members present. That situation could occur at the start of a meeting (chair hit by a bus on the way to the meeting), or at a resumption of an adjourned meeting (chair can’t make it on the later date) or part way through (chair suddenly taken ill or storms off in a huff).