[BillyMac]

Originally Posted by Amesman

While all contact by a defending reaching across to an inbounder is now deemed an intentional foul, what's the call if, as in the OP above, inbounder A reaches across the imaginary line and then is hacked on the arm? Just a personal foul on B?

The defender may not break the imaginary plane during a throwin until the ball has been released on a throw-in pass. If the defender breaks the imaginary plane during a throwin before the ball has been released on a throw-in pass, the defender’s team will receive a team delay warning, or if the team has already been warned for one of the four delay situations, this action would result in a team technical foul. If the defender contacts the ball after breaking the imaginary plane, it is a player technical foul and a team delay warning will be recorded. If the defender breaks the imaginary plane, and fouls the inbounding player, it is an intentional personal foul, and a team delay warning will be recorded. It is an intentional personal foul if the defender fouls the inbounding player, even without breaking the imaginary plane, however, in this specific case, there is no delay of game warning because the defender did not break the boundary plane.