Throw in question

[daveg144]

Had this discussion last week at a scrimmage. One of the officials brought up the play.

A1 is inbounding the ball underneath B's basket for a spot throw-in. B1, guarding A1, is 6-10 with extremely long arms making it difficult for A1 to make the inbounds pass. A2 runs down to the baseline to receive the pass. A1 throws the ball parallel to the the baseline, but the ball does not break the in-bounds plane (it stays out of bounds). A2, while standing with both feet legally in-bounds, reaches over the line and receives the pass.

Is this a violation? Please see rule 9.2.2 (my rule books are out in the car, so I may be giving you the wrong reference). It seems like the rule book is calling this a violation. I have never seen this called or discussed. To me, it sounds like a legal play. What do you say?