Breaking the plane by defense during throw in

[BillyMac]

A player inbounding the ball may step on, but not over the line. During a designated spot throwin, the player inbounding the ball must keep one foot on or over the three-foot wide designated spot. An inbounding player is allowed to jump or move one or both feet. A player inbounding the ball may move backward as far as the five-second time limit or space allows. If player moves outside the three-foot wide designated spot it is a violation, not travelling. In gymnasiums with limited space outside the sidelines and endlines, a defensive player may be asked to step back no more than three feet. A player inbounding the ball may bounce the ball on the out-of-bounds area prior to making a throwin. After a goal, or awarded goal, the team not credited with the score shall make the throw-in from any point outside the end line. A team retains this “run the endline” privilege if a timeout is called during the dead ball period after the goal. Any player of the team may make a direct throw-in or may pass the ball along the end line to a teammate outside the boundary line.

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 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 warning will be recorded. If the defender fouls the inbounding player after breaking the imaginary plane, it is an intentional personal foul, and a team warning will be recorded.

The inbounding player does not have a plane restriction, but has five seconds to release the ball and it must come directly onto the court. The ball can always be passed into the backcourt during a throwin. This situation is not a backcourt violation.