Unfortunately there is no requirement under the SSMA 2015 for notice to be provided to owners that an AGM is pending. It is the responsibility of the owners to submit Motions prior to the sending of the Agenda. Usually an owner can ascertain when an AGM may be called based on the date of the AGM immediately preceding it, however, this can be inexact.
It would be advisable to submit your Motion regarding Common Property repairs as soon as you have crafted it so it gets included in the next General Meeting. You can also obtain quotes for the repairs and include them within your Motion so as to hasten the approval process.
It may be advisable for you also to craft and submit a Motion that requires the OC to hold Committee Meetings (perhaps 2, 3, or 4 Committee meetings) throughout the year so as to promote transparency of decision making.
Schedule 1 of the SSMA 2015 states that:
7 Notice of general meetings other than first AGM
(1) This clause applies to general meetings other than the first annual general meeting of an owners corporation.
(2) Written notice of a meeting must, at least 7 days before the meeting, be given to each owner.
(3) Notice of a meeting must also be given, at least 7 days before the meeting, to each first mortgagee or covenant chargee on the strata roll if an item on the agenda is one in which the mortgagee or covenant chargee may cast a priority vote.
Note : A priority vote may be cast in the circumstances set out in clause 24.
(4) Nothing in this Part requires an owner to give notice of a meeting to himself or herself.