PTB – I’m always loath to get involved in insurance matters, but IF the Owners of the damaged Unit have insurance, then why wouldn’t they make a claim on that, include there the details of both the Tenant and the Owner of the Unit from which the leakage occurred (including the admissions by the former), and let their Insurance Company sort it out?
Unless there’s been consequential damage to Common Property, then as sympathetic at it may (collectively) feel, the Owners Corporation would be foolish to become involved, particularly as responsibility and logically the costs for making the necessary repairs would be shared with an Owner; but which one and how could that be apportioned?