Fair or foul?

[bob jenkins]

Originally posted by mcrowder
We do - in FED, "beyond" is anything that crosses a straight line between 1st base and 3rd base.

Agreed.

In OBR, "beyond" is anything that crosses a line running perpendicular to the foul lines from 1st and 3rd base (these lines meet at second base).

Reference, please. (I agree that's what's commonly used, but I don't recall reading it specifically anywhere. Then again, my memory isn't what it used to be.)