Hi giri,
I’m sorry, I understood that the reports had confirmed the leaks were due to defective common property.
You really need to establish if it is or is not. This could be why the EC is deliberating. If you haven’t already done so, have a look at the Inst. of Strata Title Management Guide to Common Property. If that’s not any help, ask the building consultant you engaged to advise.
I would be happy to help further but I would really need to have a look at the details to advise further.
Regards,
RobT