Ambidextrous Pitcher Question

[Don Mueller]

Originally Posted by cshs81

I read a report of a pitcher for a college (Creighton maybe) who is ambidextrous. I had heard that he must choose which hand he is going to throw with either a)at the beginning of the inning or b)before the first pitch to a batter.

However, I can't find the rule that states that. I looked in OBR but do not have access to FED/NCAA.

Did I miss it in OBR?

Sorry I don't have my book for rule reference, but Fed he has to declare for each batter.
I'm betting OBR and NCAA is the same.