Is there any law that a person below the age of 20 cannot lead the congregation at tefillat Musaf?
I heard someone (Not a Rabbi but a self-learner) doing a shiur, that since the half shekel at the time of the Mishkan was contributed only by men over 20, and tefillat Musaf can be alluded to the same, and because of that reason, a boy below the age of 20 couldn't do the same.
I don't know whether he was saying what he was thinking or whatsoever. But is there any contradiction to his statement?