This comment~After Watching Boys Cal Ripken World Series

[The Man In Blue]

Apparently from what you posted
with no Runners on base
sometimes there can be a balk and other times it would be a nothing (like what I watched in the game.)
Appears to be some flexibility in those rules.

With no runners on base there can never be a balk. The same actions are illegal, but it is an illegal pitch (not a balk).

I wish I could find the example that I was reading about the "do nothing balk." It was quite a lively discussion because only a few umpires were taking the position that this existed.

 

[The Man In Blue]

Not sure if they use NHFS rules but (unfortunately) OK does have girls HS (and MS) slow pitch..

I was misinformed! Or I'm gullible.

Apparently Wisconsin also had it as recently as 2020 as I found their training presentation online.