[grunewar]

Rule 4, Section XII-Throw-In

A throw-in is a method of putting the ball in play from out-of-bounds in accordance with Rule 8-Section III. The throw-in begins when the ball is at the disposal of the team or player entitled to it, and ends when the ball is released by the thrower-in.

Rule 8 Out of Bounds Section III-The Throw-In

a. The throw-in starts when the ball is at the disposal of a player entitled to the throw-in. He shall release the ball inbounds within 5 seconds from the time the throw-in starts. Until the passed ball has crossed the plane of the boundary, no player shall have any part of his person over the boundary line and teammates shall not occupy positions parallel or adjacent to the baseline if an opponent desires one of those positions. The defensive man shall have the right to be between his man and the basket.

Rule 10, Section IV – Thrower-in

a. A thrower-in shall not (1) carry the ball onto the court; (2) fail to release the ball within 5 seconds; (3) touch it on the court before it has touched another player; (4) leave the designated throw-in spot; (5) throw the ball so that it enters the basket before touching anyone on the court; (6) step over the boundary line while inbounding the ball; (7) cause the ball to go out-of-bounds without being touched inbounds; (8) leave the playing surface to gain an advantage on a throw-in; (9) hand the ball to a player on the court. EXCEPTION: After a field goal or free throw as a result of a personal foul, the thrower-in may run the end line or pass to a teammate behind the end line.

b. Once an official recognizes the designated player to throw the ball in, there shall be no change of the thrower-in unless the offensive team makes a substitution, there is a regular or 20-second timeout or a suspension of play.
PENALTY: Loss of ball. The ball is awarded to the opposing team at the original spot of the throw-in.