I think the devil is going to be in the fine-print detail
A Notice of Final Rule Making (NFRM) will be issued as soon as legal drafting can be completed, with the expectation that the new rules will be introduced in early 2009.
And
This rule will apply not only to aircraft that are inbound to the aerodrome, but also to aircraft that are overflying the aerodrome or simply transiting through this airspace, if the aerodrome is depicted in the aeronautical charts and the aircraft is flying at a height that could put it in conflict with aerodrome traffic.
is a nice catchall clause, which as Mr Smith pointed out, will be difficult or impractical to fully comply with, at places where there are several closely spaced CTAFs, eg the Sydney basin.
Just to complicate the issue, are helicopter landing sites classed as aerodromes ?, The ERSA shows the hospital landing sites as having a (usually non 126.7) CTAF frequency.