Most don't but some boys are so good that the schools let them play for fear of losing them from their 1st 15 program. Siale is one of those players. He was on the extended bench for the final so I'd guess that he'd picked up an injury. Or dropped.I’m surprised some of these rugby elite schools allow their kids to play actually. Assumed it needed their permission, although timing doesn’t conflict with them playing first XV so assume they had no issue with it?