Slackie - Gday! I do beleive you are correct!
Awib is acredited by metservice, but UNICOM operators can still give weather report if they have an issued licence as this falls under Basic Weather Reports, normal rules apply for pilots using it, ie cant use it to decide on alternates etc
If UNICOM wanted to do METAR's etc then yes, they would need to do the Met part 174 (from memory) training
Slackie, do you think that UNICOM at AR are too proactive?