Looks like a GCAA requirement rather than something EK have made up. It is a little concerning that "3rd party reports" are enough to get you dragged in for a battery of tests which are potentially career ending. Looks to me like one Grade 2 out to make a name for themselves could cause somebody no end of grief. "When I was in the bar on a layover nursing my orange juice it seemed like the Captain was having a lot to drink...."