User blog comment:Lemamamn/WHY SEASON 6 IS OBVIOUSLY FANS VS FAVS/ WHO I WANT BACK/@comment-24259216-20170518192852/@comment-30933826-20170518232005

We honestly don't really know that the second and third generation contestants were all sixteen at their debut. We know Leonard was, and we can assume that the others were, but we don't actually know for sure.

I'd doubt they'd let younger people compete, of course, and definitely not people who are very much older, but I don't think the rules are that strict.