Back court violation exception for defender?

[bob jenkins]

From 2006-2007:

SITUATION 7: Team A is making a throw-in near the division line in the team's backcourt (Team B's frontcourt). A1's throw-in is deflected by B1, who is applying direct pressure on A1. B2 jumps from his/her frontcourt, catches the ball in the air and lands in the backcourt. RULING: Backcourt violation on Team B. The throw-in ends with B1's deflection (legal touch). When B2 gains possession/ control in the air, he/she has frontcourt status. A backcourt violation has occurred when B2 lands in backcourt. (9-9-1; 9-9-3)