Heading: Contact: General principles     Sub Heading: Blocking

"Blocking is illegal personal contact which impedes the progress of an opponent with or without the ball.

A player who is attempting to screen is committing a blocking foul if contact occurs when moving, and the opponent is stationary or retreating.

If a player disregards the ball, faces an opponent and shifts position as the opponent shifts, that player is primarily responsible for any contact that occurs, unless other factors are involved.

The expression “unless other factors are involved” refers to deliberate pushing, charging or holding of the player who is being screened.

It is legal for a player to extend the arm(s) or elbow(s) outside of the cylinder in taking position on the court but they must be moved inside the cylinder when an opponent attempts to pass by. If the arm(s) or elbow(s) are outside the cylinder and contact occurs, it is blocking or holding."