Though I cannot find anyting to back this up in the rulebook, experience says that while removing the DH is allowed in MLB, the PB game simply doesn't allow it. I'm not sure if it's just too hard to program, or what. IT's not an AL thing, it's a PB thing.

There have been MANY times I'd like to lose the DH late in a game, but you just can't do it.

If someone knows the "official" answer, I know I'd be curious....