Originally Posted by
Breakthesilence
I just want to know if you are legally authorized to do it and not if you would or wouldn't do that because of Mach effect etc.
Thank you
I'd say that you are legally authorized to break the rules in the event of an emergency. In other words, you can't get back into your departure airport and will run out of fuel if you don't get up to a higher altitude, then you have a justifiable reason to be acting as the equivalent in this case of a test pilot.
More of a remote area ops scenario.