I believe the only age limit is in ISU. I think this is a good step in the right direction. I think USFSA needs to follow in their footsteps and set some limits for national competitions. The current system is basically set up for kids to learn double and triple jumps as young as possible. You can not even compete as a juvenile if you are over 12 years old, and you are expected to compete all of the double jumps at that level, so should probably be landing triples in practice. It's hard as a parent to tell your child that they can't learn the next jump, but there is very little information out there on how to prevent injuries. I know, because I've looked.