How do you know that? Because one person you spoke to on the phone was able to recite the legal requirements to you?
Firstly being able to recite the requirements doesn't equate to being able to recognise them on any given international document.
Secondly, a different person (there was definitely more than one member of staff the last time I was at that particular office) may not even know the precise requirements in the first place [and, again, even if they do know them, they may still not be able to recognise them on a foreign license...]