Hi Shackleton
First thing to do is to calm down
I’ll go agagain Austman and duggest that in tjth case there is no urgency
Installation of the windows in hardly likely to affect any structural integrity of the building.
The installation, or rather the approval for the Window installation is entirely at the lot owners risk.
The SSMA gives the power to the OC to have unapproved alterations to common property reversed and the costs born by the lot owner. The OC can contract to have the remediation done and charge the lot owner. The OC has the right to enter property in order to carry out remediation.
So on all counts, it’s the errant lot owner who faces the greatest financial risk.
The window installation is all reversible.
Your action in the interim should be to ask the errant owner if they have OC approval for the new windows. If not explain that they are breacing a number of bylaws and that you will inform the SM to take action through NCAT
If you have feral lot owners like this I am not surprised an SM was appointed by the court.