DC plays a sport which is popular in other countries, and played by a small community of adults here, but just in the early stages of developing junior competitions. They have four age groups, u12, u14, u16, u18, but juniors who have been playing for a while are finding their own age groups under-challenging and are wanting to "play up" against stronger athletes. This isn't prevented by any written rules but is being discouraged by some competition organisers. Surely playing up according to ability rather than age is normal in most sports, isn't it?