So what was wrong with "in the vicinity"? Everyone has a different definition of circuit area.... why are we going back in time? As above, the inbound call should be time based. Many moons ago it was suggested to CASA that 7 mins was about right, but they did not take it up (or understand). And still don't it seems!
On top of that they don't seem to understand that the MULTICOM was designed to have a common frequency at low levels. By suggesting it is OK to be on the Area Frequency they are in fact undermining the role of the MULTICOM.