Flatchatter g-g – You hit the nail on the head.
It is a noise issue primarily, and compliance with a flooring by-law secondarily.
This is the noise by-law in the Model By-Laws for Residential Strata Schemes:
Noise
An owner or occupier of a lot, or any invitee of an owner or occupier of a lot, must not create any noise on a lot or the common property likely to interfere with the peaceful enjoyment of the owner or occupier of another lot or of any person lawfully using common property.
In terms of NCAT, provided the acoustic engineer’s evidence is good enough, NCAT will make orders for abatement of the noise – usually carpeting.