Indeed bose-x....!!
So, Mr Glass Half Empty, if the ATPL holder lets his licence lapse for the period of an aerobatic course and reverts to a PPL, that's OK. But if he doesn't, it isn't?
Surely even the obstinate "Befehl ist Befehl - so sei es!" rulemakers can't be that daft?
At least the UK CAA are taking the sensible, pragmatic view.