It seems like every APD thread receives some complaining about the age requirement. Grow up, lord jesus.
Whitelisting is currently closed for new applicants and will be open in the near future as we try to build our records of current APD members. We have to find out who's currently in the APD and who's not. It would be an absolute mess to take in new applicants while we also figure out who our current members are (and there's 1300 of them).
Keep posted. It won't be too long.