Fighting challenges?

Are there any "official" rules to fighting a challenge? Would it be bad play running to prevent death or do you have to stay in the fight even though you know you will lose?

Usually, you set the rules with your opponent before the match.

For example, no leaving the area or to the stun/death.

Also, if the RP fits, im sure you could even break the challenge rules if you wanted.

All depends on your align, rp and (sub-)cabal choice.