Your strata manager may have delegated powers to act as the Secretary, but any decisions can be rescinded by the committee. As the SM on what grounds and by what authority they have called the meeting. This is what the Act says:
(1) The secretary or a strata committee of an owners corporation may convene a general meeting (that is not an annual general meeting) of the owners corporation at any time.
(2) The secretary of the owners corporation, or another officer if the secretary is absent, must convene a general meeting (that is not an annual general meeting) of the owners corporation as soon as practicable, and not later than 14 days after, receiving a qualified request.
(3) A meeting may be convened on a qualified request even if the first annual general meeting has not been held.
(4) A request is a qualified request for the purposes of this section if it is made by one or more owners of a lot or lots in the strata scheme having a total unit entitlement of at least one-quarter of the aggregate unit entitlements.