I've got the youth applications setup in the lobby of the school.
All existing kids will have to re-apply ... I know it's a pain, but I promise it'll take less than 3 minutes of your time (not going to be anal on review for the people that were already accepted into the old kids role).
It simply ensures us that you've read the new rules and emphasizes that kids / teens should now enroll with the schools.
If you want to age your character in the future, simply IM an officer listed in the group and ask them for the age-appropriate role. No need to re-apply!
Thanks!