At some events in the past, Sail Newport has stated that each child must be accompanied by an adult throughout the regatta (some go on the water, others stay ashore, depending if they bring their own boat).
I didn't see it mentioned for this event, so I didn't include it.
They've also stopped doing check-in / check-out tags locally (all around NBYA, actually). I've seen some nasty penalties come from not turning in your tag, well deserved after volunteers spend several hours trying to call your emergency contact to find out if you're accounted for.
Mike