I don't think that makes sense at all. Busy CTAFs will have their own CTAF (comprehendi?!
). All the others seem to have 126.7.
The idea of the Multicom was to have a low-altitude freq for use at light traffic airports (or Ma and Pa Kettle's) so that the Area freq wasn't congested.
IFR would have Area/Discrete CTAF and VFR would have Multicom (if not a discrete CTAF).
I think the CAAP has got it wrong.
Cruising around monitoring the (combined) Area freq(s) getting ready for descent we hear Joe Bloggs at Ma Kettle's place; not the way it should be. He should be on the Multicom. Good on him for talking, but he should be on the "in the vicinity" freq, logically, IMO, the Multicom.