Procedure
The throw-in is taken from the point where the ball crossed the touch-line. The throw-in is taken by the opponents of the player who last touched the ball when it crossed the touch-line, either on the ground or in the air. Opposing players may stand at any distance from the thrower but no closer than 2m (2yds), so long as they are still on the pitch. A player may take a throw in at a distance further back from the touch-line, and, typically, a referee will tolerate small discrepancies between the position where the ball crossed the touch-line and the position of the throw in.
At the moment of delivering the ball, the thrower must face the field of play, have both feet on the ground on or outside the touch line, and use both hands to deliver the ball from behind and over their head.
The ball becomes in play as soon as it enters the field of play.
A goal cannot be scored directly from a throw-in.
A own goal cannot be scored directly from a throw-in - if a player throws the ball directly into his goal without any other player touching it the result is a corner kick to the opposing side.
A player may not be penalised for being in an offside position direct from a throw-in.
Read more about this topic: Throw-in