Is misapplication of a balk rule protestable?

[andrewm]

I'm still dealing with the pickoff from the windup issue with a few umps in our USSSA league. Some know the rule, some don't. The ones that don't say they'll look it up for future reference. However, I have one ump that said he would look it up after I asked him about it before a game. Before our next game he told me that he looked it up and called USSSA and told me it was a balk. He said he'd call a balk every time we ran it. For league games, that's fine, I'm not going to press the issue. But, if he calls a tournament game and balks us, I don't really want to let it slide.

I know judgement calls are not protestable, and generally balks are judgement calls. But can I protest for a misapplication of the balk rule?

If not, I'll just have to live with it when he umps our games.