Obstruction question

[greymule]

OBR recognizes type A and type B OBS, which Fed does not. OBR does have an automatic one-base award, but only for type A.

I do not do NCAA baseball, but from reading Carl Childress's Baseball Rules Differences, I know that the three codes differ significantly. For example, neither OBR nor NCAA recognizes a fake take or verbal OBS. But Fed and NCAA are similar in that "OBS is always a delayed dead ball," while in OBR, it is immediately dead on type A. In fact, in Fed and NCAA baseball, the ball isn't necessarily dead even when the obstructed runner is put out (as it is in ASA softball).