Originally Posted by
But seriously
The whole thing is literally 2 paragraphs. The email explaining it is pretty much as long as the LOA itself.
To answer your questions: No, there is no criteria, just like there is no criteria for normal critical coverage.
If they never declare it, then they won’t get enough people to cover their flights.
They need a minimum daily or something. Unless you live in Killeen, no one is going to pick up the GRK lost day. Even at 300% that’s only a bit over six hours pay for your double overnight and 36ish hours of misery.