If a player, while correctly taking a throw-in, intentionally throws the ball at an opponent in order to play the ball again but neither in a careless nor a reckless manner nor using excessive force, the referee must allow play to continue.
If the ball enters the opponents’ goal directly from a throw-in, the referee must award a goal kick. If the ball enters the thrower’s own goal directly from a throw-in, the referee must award a corner kick.
If the ball touches the ground before entering the field of play, the throw-in is retaken by the same team from the same position provided that it was taken in line with the correct procedure. If the throw-in is not taken in line with the correct procedure, it is retaken by the opposing team.
LAW 16: THE GOAL KICK
If a player who has taken a goal kick correctly deliberately plays the ball a second time when the ball has left the penalty area before another player has touched it, an indirect free kick is awarded to the opposing team in the position where the second touch occurred .
However, if the player touches the ball with his hand, he must be penalised with a direct free kick and a disciplinary sanction if required.
If an opponent enters the penalty area before the ball is in play and is fouled by a defender, the goal kick is retaken and the defender may be cautioned or sent off depending on the nature of the offence.
LAW 17: THE CORNER KICK
Referees are reminded that opponents must remain at least 9.15 m (10 yds) from the corner arc until the ball is in play (the optional marks off the field of play may be used for assistance). Where necessary, the referee must warn any player within this distance before the corner kick is taken and caution the player if he subsequently fails to retreat to the correct distance.
If the kicker touches the ball a second time before it has touched another player, an indirect free kick is awarded to the opposing team in the position where the second touch occurred .
If a player, while correctly taking a corner kick, intentionally kicks the ball at an opponent in order to play the ball again but neither in a careless nor a reckless manner nor using excessive force, the referee must allow play to continue.
The ball must be placed inside the corner arc and is in play when it is kicked, therefore the ball does not need to leave the corner arc to be in play.