Look up Strata Schemes Management Act 2015. Read what it says about Strata Committee meetings. It is clear about notifying ALL owners of the strata committee meeting. Owners can attend the strata committee meeting but they cannot vote. It is not good enough to send owners the minutes after the event. Also, I would check the rules about how many people should be at the meeting.
What kind of “development application” is this? If anything changes the external appearance of common property, a general meeting of the Owners Corporation is required. A general meeting (whether it is Annual General Meeting or Extraordinary General Meeting) invites ALL owners. to pass the motion, you require 75% of the vote at the general meeting. The only exception would be environmental things like solar panels.
“Changing the external appearance of common property” can mean a lot of things. e.g. repainting the roof red, installing speed humps and bollards, building a swimming pool, solar panels, garden refurbishment.
I implore you to read the Strata Schemes Management Act 2015 yourself. You should not rely on the memories of other forum members. Arm yourself with knowledge.