piloting without exceptional skill or alertness. Do they mean me
Certainly not ETOPS!
What they mean is that when I as the demonstration test pilot fly the plane, If I use exceptional skill or alertness to make the plane do what the requirement says it must - it might not have passed. Another test pilot might come to refly it, and use "regular" skills, and see if they can fly the same maneuver.
This can be a really tough call to be objective. The demonstration test pilot must have lots of experience, but in essence, they are not really supposed to call upon that skill, unless something goes wrong.
ST,
Which country's regulations are you quoting?
I42, That's copied from the latest FAA FAR Part 23, though the wording for that requirement has been largely unchanged since the CAR 3 days.