No.. No such policy is in place, but I know they do not like having egg on their face either.. meaning, you my have just pissed someone off and now your in the bad file, so no more chance.. BUT you can give them a call, (HR dept.) and explain that you had a personal situation that resulted in your choice to delay your employment with the airline.. just bad timing.
that resolved you would like to be reconsidered.
good luck,
Poisoned by Compromise
Krunch