The new Secretary is correct in stating that the privacy screens are a Major Renovation. They would clearly be impacting the external appearance of the building.
The original approval should not have been given by the Committee as they had no authority to issue this approval.
There are many different ways to create privacy that do not include fixed panels.
With regard to plants on balconies – what do your by-laws say about this issue? Planting a hedge of bamboo would also impact on the external appearance of a building so be mindful of that issue too.
Planting bamboo in heavy pots may also impact on structural weight limitations for the balcony and the overall safety of the building.
One lot owner’s objection to the use and enjoyment of their Lot being adversely affected by the actions of another Lot owner is just as valid as several lot owner’s objections. The Act is designed to protect the rights of all Lot owners, whether they are in the minority or are in the majority. The protection of these ‘minority’ rights are available via the doctrine of fraud on a power, and this doctrine is recognised by the Supreme Court.