Similarly with B-3 which, as written, seems to mean that we now need to know where incoming substitutes are at the moment of the RFP (and, specifically, are they outside the area defined in B-2).
For example:
Play 1: A34 is in the huddle at the snap. Team A break the huddle, A34 lines up an the tail back in an I formation, and then goes in to motion, taking two steps forwards and then shuffling sideways and is positioned directly behind the right tackle, and still moving, at the snap. A34 is unrestricted.
Play 2: Team A break the huddle and run exactly the same play as Play 1. However, rather than being in the huddle at the RFP, A34 was an incoming substitute and was 10-15 yards away from the huddle at the RFP although he does subsequently join the huddle. However, he now meets all the criteria under B-3 which make him restricted (he is in motion at the snap and he has been outside the area in B-2 after the RFP) even though from huddle to snap this is exactly the same play as in Play 1.