CaptainMidnight
ASA and Defence are not the only two "permited" to operate NAVAIDS. Quite a number of NDBs are privately operated - Renmark and Shepparton are just two that come to mind - and they have been offered to aerodrome operators for some time.
As the only holder of the CASR 171 certificate, AsA is the only civilian organisation permitted to operate navaids. They can be owned by anybody, but they can only be operated under the 171 certificate. The aerodromes can buy them, but the only way they can be operated is under contract with AsA....which is going to cost the aerodromes more money.
As far as I know the SY VOR is scheduled to be decommissioned. I have not heard of any plans to re-instate it...but that doesn't mean it won't happen.
Alpha