I heard someone say Barron "can't be on Q team, he's too young to get clearance".
Well here's what I could find on the matter:
For example, Appendix A of Security Executive Agent Directive 4 (SEAD-4) states that “[t]he U.S. Government does not discriminate on the basis of race, color, religion, sex, national origin, disability, or sexual orientation in making a national security eligibility determination” (no mention of age). And SEAD-4 later goes on to explicitly indicate that adjudicators, in assessing the relevance of an individual’s past behavior, should take into account, among other considerations, “the individual’s age and maturity at the time of the conduct.”
It states NO specific age restrictions or requirements.