On out but, if possible although unlikely, have a backup plan for another team.
Colorado got SDSU to agree to a game on Thursday because at that point there was virtually no backing out.
BYU should agree to any PAC12 game, then contact a backup, really anyone, and say if as late as Thursday we call you up will you play us? We will even share tv revenue, pay for travel like usual, etc. Since it's pretty crappy we are using u as a backup although, unlike the pac we will try to compensate you for your willingness to accomadate us.