It's important to note that disclosure laws have no bearing on minors. There was a plot twist in a movie once in which a prenuptial agreement was found invalid because the wife did not disclose that she was a minor before entering into it.
That was all Hollywood magic, of course, but it's accurate. Fair result? Probably not, but minors stand as a protected class and the law prefers to let them get away with certain things that adults are not.