Noggin,
you wrote;
>>The requirement for a FI to have CPL level knowledge comes from ICAO. You would certainly not become a FI in the majority of countries without that level of knowledge.<<
.... but not JAR CPL level knowledge (my main point).
I recently went to the ststes and showed a few instructors over there my JAR CPL training manuals. Thay were absolutely dumbfounded and couldn't beleive a FI candidate in UK had to endure a six month minimum theory course and subject matter in such (stupid) depth. They explained a system such as that would never be tolerated in USA.
BTW I'm not saying there shouldn't be a theory course or exams for a FI course candidate... just not JAR CPL !
Best regards,
UKPPL