I see. So you think that an Australian citizen who happens to be in the USA and buys a drone to fly while in the USA will be applying for and granted VH registration for that drone by CASA?
As to your second point, there are many aircraft flying around in Australia without VH registration. Have you heard of RAAus, for example? CASA seems to think there’s no ‘regulatory risk’ in those aircraft not being on the VH register.