I am not so familiar with NSW. I suspect that ‘qualified request’ would refer to a provision similar to one we have in the ACT whereby a petition of 25% of owners requesting a general meeting and stating the topic to be considered compels the secretary (or committee) to call a general meeting.
In many OCs the secretarial function of managing the mechanics of calling the meeting is outsourced to a strata manager, but the buck still stops with the committee.