alt Hacker News> It is difficult to square the notional unconstitutionality of this with the fact that the exercise of other Constitutional rights have long been conditional on age. This just looks like another example.
> What is the consistent principle of law? I am having difficulty finding one that would support this ruling.
The Constitution of the US mentions age in a few very specific places, namely the minimum age to run for The House, The Senate, The Presidential seat, and I believe voting age.
I don't understand your point.
The interpretation of existing jurisprudence is that age limits on the free exercise of rights is Constitutional in many circumstances regardless of if such limits are not explicitly in the Constitution. This is a simple observation of the current state of reality.
Those age limits are arbitrary and the justification can sometimes be nebulous but they clearly exist in the US.