I know the subject of "approved source of QNH" has been done before here (Yes i DID use the search function!)
A number of airfields have AWS listed with an associated phone number that you call to receive the info.
Simple if you pair up your Bluetooth headset to your phone (Telstra of course) and call it up.
Not so simple if you : are a bit busy/ don't have Telstra/ have been told to STOP SEXTING AND TURN OFF THAT PHONE!
So now your trusty ground handling agent who you can talk to on the company frequency is NOT an approved MET observer.
However he can call a phone number and repeat the words he hears. This is something a primary school student can manage and if a parrot could dial a phone Polly could do it as well.
Can this then be used as an approved QNH source?
Note that AIP ENR 1.5 P34 Para 5.3.2 lists approved
sources as
"ATC,ATIS,AWIS and CASA-approved meteorological observers".
and AIP GEN 3.5 P22 Para 7.4.5 states "The integrity of the barometric system in BOM-accepted AWSs is such that they are an approved source of QNH"
My take on it is:
How you get that AWS weather may be by radio/ACARS/telephone/parrot. It is the SOURCE that is approved.
What is the considered opinion of the "experts" here on pPrune?