sleemanj:
Unfortunately the CGA does not say this AFAIK, is giving some wishful thinking there.
More than happy to be proven wrong with cite of the appropriate section of the CGA, but as I say, I don't think it exists.
When people need professional advice, they tend to go to the professionals for that advice, in case it is going to be challenged. So has their interpretation actually been challenged by anyone with suitable qualifications to challenge it?