X-Ray Vision in Perth?
Having worked for two companies that had approach ban points (imposed by regulation), I think they are of questionable value.
In the case of CAT2/3, sure, but CAT 1 and non precision it is ridiculous. The pilot is in a better position to judge visibility in an environment that can change rapidly.
I have had VIS reports of 2000m when the runway is clearly in sight from 10nm.