AGM minutes

Hello

Could you kindly advise me, how big the percentage of the owners/entitlements needs to be, not to adopt some of the AGM minutes, if some of them are wrongly stated.

Also could you kindly advise me, if an owner, who moved in to the building 3 years ago is entitled to ask the OC for a structural  engineer to examine his balcony of it safety, because e wants to have ” piece of mind”, if the balcony is safe. There is nothing wrong with the balcony, he admitted it himself, but he just wants to make sure and is asking the OC to pay for it. Is the OC required to do so? 
He wants to put this motion on the AGM agenda. How many votes we need to dismiss this motion?
Thank you for your advice.

Kind regards
Alinka