They do - it's called a CA/GRS. Vastly different from just a UNICOM.
Buckshot1777,
Another example of a make work by regulation stitch-up, to create jobs for former (mostly) Flight Service people.
The "limitations" as to who could be the Australian unique CAGRO was buried away in about page 398 of a 450 page NPRM. Apart from those responsible, I think about two of us in industry discovered the stitch-up, by then it was way too late.
And, as per SOP, absolutely no risk analysis or benefit/cost justification.
Again, always a one-way ratchet of Australian unique increased costs and restrictions.
Tootle pip!!