Throw-in violation or OOB violation?

[Nevadaref]

Team A is awarded a throw-in on a sideline of the court at the FT line extended in the backcourt. A1 steps OOB and the official administers the ball. A1 passes the ball on the OOB side of the boundary plane to the other end of the court and A2 runs over and catches the ball while it is still on the OOB side of the boundary plane, but has placed one foot OOB prior to catching the ball, so that when he makes contact with the ball he has one foot inbounds and one foot OOB at the 28 foot line in the frontcourt.

Is this a throw-in violation per 9-2-3 or an OOB violation per 9-3-2? It seems that both rules would apply equally to the situation. Does one take precedence over the other? More importantly where is the throw-in for Team B following the violation? Is it from the FT line extended in Team B's frontcourt or from the 28 foot line in their backcourt?