The minimum age for being of the annointed is debatable. First of all,
you would have to be baptized. Then, you would have to have proven
yourself to the point where God would select you to serve as a king and
priest in heaven. So, junior applicants would not be acceptable. Jesus
was 30 when he was baptized, and he was infinitely qualified. A person
under 30 who started partaking today would be regarded suspiciously.
If the age was lowered to 20, I would guess that the fraud rate would be
around 65%, but I don't think its worth re-running the calculation for this.
My point is that either the doctrine is seriously flawed, or the most
important group of God-selected JW's is bogus. (In reality, they are both
bogus).