[Tristan Lall]

As mentioned above, it's unlikely that a judge (they wear blue FIRST shirts) told you that. If you tell us what sort of shirt (colour and style) the volunteer was wearing, we can probably tell you what their responsibility was.

If it was a venue restriction, someone should have said so, in advance if at all possible. (I doubt it was actually a venue restriction.)

And no, there's no battery charger rule this year. (It used to be in "The Robot", which I always figured was a mistake—it belonged in "At The Events", unless the intention was to prohibit robots from using improperly-charged batteries, a prohibition which was never articulated in the old rule.)