NSA 10U Strike Zone

[bwbuddy]

Granted, I realize that is is difficult to call strikes in 10U B-level FP, but I witnessed a strike zone this week I had never seen before. Twice, the NSA ump called a strike that actually hit the plate. I heard him tell the coach that since the batter was up in the front of the box that it was actually a strike when it crossed her body.

I had always thought that the ball had to pass completely over the plate, but as a I read the definition straight from the NSA rule book for FP, now I not so sure.

What's the correct practice?

NSA FP definition (emphasis mine):

STRIKE ZONE: The strike zone is that space over any part of
home plate that is between the batter's armpit and the top of the
batter's knees when the natural batting stance is assumed. Any part
of the ball passing through this strike zone is considered a strike. The
umpire is instructed to determine the batter's strike zone according to
the batter's usual stance when swinging at a pitch.