"What makes you more qualified? What training have you received that makes you qualified to determine whether deicing or a new application of deicing is required? Or is it just assumed that you know? How does your possible training compare to the person the ground?"
Maybe 16 years military plus 26 years civilian flying, including 747s, qualifies me for making a some sort of a safe assessment.
But doubtless some EASA gnome will insist I go on a 4 hour training course to prove that I can recognise aerofoil contamination when I see it?
I'm NOT querying ignoring national rules requiring an external operator.
My main point was that the de-icing crews operating in 60N were surprisingly unaware that their de-icing operation was inadequate and needed repeating at great cost of fluid and time.
I have to presume their training was inadequate as de-icing operators and hope that the Canadian "assessors" are better prepared?