Single engine taxi is also a farce . How many shut one down just a second before stopping on stand , just to tick the box , to " comply"
As for the letters , if you have one you have a wonderfull arrow in your quiver. Lets see you run low on fuel into somewhere requiring a fuel emergency . The subsequent regulating authority investigates , only for you to produce your letter of intimidation. Hold onto those letters boys and girls, they may well count in your favour.