To be or not to be?

To be or not to be?  That was William Shakespeare’s question, but a follower of the Elegant Editor was on a plane flight and contemplated a similar question.

Check out her boarding pass from AirTran Airways:

no vs not later thanBoarding pass MUST be presented at the Gate not later than 10 minutes before departure.

It doesn’t appear to be proper English usage.   Is it supposed to be “Boarding pass must be presented at the gate NO later than 10 minutes before departure”?

I’ll leave this up to my readers to contemplate for now, and I will comment on this later.