In an article in the US
Flying magazine October 2018 under the heading “Instrument currency at home” it states that the FAA has changed the regulations so the use of approved home simulators is available to maintain instrument rating currency.
“That’s right, you no longer need to have an instructor seated next to you or go fly with a safety pilot under the hood, and you never even need to leave the comfort of your living room. …You’ll need to purchase an approved aviation training device that includes actual physical knobs and switches or a touch screen that can replicate them. A few are available, one from FlyThisSim for about $5,400…”
Have the Aussie rules been updated? As we all know, in the USA instrument ratings do not have to be renewed. As long as you remain current, you have them forever. In the Flight Review there is no requirement to do any instrument flying at all. This keeps costs down and the industry growing.