If it was NSW, I’d add that the law here has a get-out clause. The (state) law about having no more than two adults per bedroom does not apply if the adults are all related.
Also of interest re water supply. We started to investigate separate meters, and the local water authority was happy to supply them. Now we’ve started to hear that water authorities in other regions will happily supply meters – but will only read and bill one meter, leaving the OC to try and apportion the bills to individual units.
In NSW it’s also illegal for an owner to pass on to the tenant either a standing fee (strata properties) or some water-related charge, unless the property is individually metered.
And yes it’s annoying that one unit can use such a large amount of water and expect others to pay for it.