Gosh.
I must have misread your #3:
in-flight be proactive and regularly seek updates, e.g. half hour and hourly METAR/SPECI...
There was me thinking a “half hour” was 30 minutes.
What phraseology should I use on the half hour to seek an update, as you’ve advised?
It’s so very Australian that the ANSP devotes so much energy to explaining the services that it
doesn’t provide.