Player enters a court without being beckoned.

[KJUmp]

Originally Posted by BillyMac

I'm a little confused by your question, but if he comes onto the court without being beckoned during a live ball, the spot will be at the division line, opposite the table.

I was going back to the sitch as outlined in the OP. ......"and he [A1] passes the ball to A2 on the court."

While the consensus among the replies seems to favor handling this by stopping play, motioning the sub back to the table, and not issuing a T; if throw-in has been completed (as in the OP), I would think that we would have to resume play with a throw-in by Team A at POI not the division line. Correct?