@Kayriel @Umetsu : I don't know if it's what he meant, but the nobles did leave in loopholes for their 'cheating' to be 'legal'
The 'actual rules', as they would say, are that:
1. Use a shooter glove, either school supplied or bring your own (note this part)
2. Rewriting the glove's code or interfering with other players with magic is not allowed (basically aiming this directly at Abel given the things he did before)
3. The offense/defense, with role reversal at 5 min marks.
So since the nobles brought their own gloves with their own code, and they didn't rewrite their code during the match, they're not 'technically' breaking the rules.
And the teacher will probably pretend 5 minutes hasn't passed yet even if it did just to give them extra time (the same thing he did with coin flip, note that he didn't say what's the coin result is)
Now, what I'm hoping will happen is:
After 5 minutes pass and Abel ask about switching, the teacher refuse.
Then he decide it's time to LEGALLY crush them.
He's not allowed to use magic to interfere with the players, so he'll just use magic to interfere with the bullets themselves, and have them hit their own team (or just dodge in such way to cause similar result)
And sure they're not the rabbit right now so they're not out, but that make the humiliation even worse.
Then when the teacher finally have to switch roles, before Abel get to do much he realize Ted and Eliza are raring for murder and let them do it, because getting crushed by Abel or Eliza is one thing, but when TED rekt you....