Winston – as your AGM is fast approaching and you’ve had no responses to date, I’ll jump in.
Regarding a limitation on matters to be considered by the Executive Committee (E/C), notwithstanding any specifically imposed by the Owners Corporation (O/C) under the mandatory Agenda item to that effect at each AGM, if a Scheme has no Registered By-Law covering a matter such as site security, then any proposal such as for the installation of CCTV Cameras must be decided by the O/C, where in the particular instance you raise a special resolution is required (≥75% in favour under a poll-vote) as the Cameras would be an an addition to / a new structure on the Common Property (Ref Sect 65A).
As for General Business at AGMs, whilst that’s a legitimate item on the Agenda where some worthwhile discussions may take place, ONLY specific Motions that have been included on the issued Agenda may be voted upon / resolved one way or the other by those present an entitled to vote (including by proxy).
It’s too late for you to on this occasion submit any Motions (such as re the CCTV) on the Agenda for the AGM, but for future reference have a look through THIS document as produced by the NSW Department of Fair Trading (there’s a section at Para 3, P19 re Agenda Motions).