Hi Pengy.
Airservices were responsible at the time. The AWIS was provided via voice modulation on the VOR. The AWIS was fine, but the voice modulation on the aid had failed.
During the unserviceable period, the AWIS was available only by phone.
The day after the incident, ASA repaired the VOR, and AWIS services to airborne aircraft were resumed.
It is since then, that ASA are placing the AWIS responsibility onto airport owners. They are forcing airport owners to install and maintain their own VHF AWIS, as is the case now in Mildura.
Had they repaired the VOR AWIS in a timely manner, the affected crews could have accessed it at TOPC out of Adelaide and realised it was deteriorating quickly.
That statement of "report faults to BoM/aerodrome operator" is classic washing of hands by ASA. If they aren't responsible for any part of the AWIS infrastructure then they can't be blamed when it's not available.