Hi, well I made inquiries about that, as my friend at the time 'had' MND, not only that he 'was' unable to even sign his name, I was told that there are things in place and from what i understood they have to ask Canberra first, but things can change they said. You'd have to be very sick IMO as for old they do have wheelchairs.
Sadly my mate passed away the day I got back.