[DrPete]

The old case book reference applies to a situation where Team A has the ball in the front court.

Wouldn't this situation also apply and be a back court violation?
If the ball was in control of team A and still in the back court, but A1 made a pass to A2 (also in the BC) near the division line, that was deflected by B1, who is standing in the front court, and then caught by A2 (still in the BC). Team A still has team control, ball has front court status, then A2's catch "causes the ball to have BC status and is also the first to touch in the BC".

I can see coaches and fans going ballistic when you call this a back court violation !!!