WPARef Question of the Week Posted on February 12, 2018 by admin What are the criteria in determining if an offside infraction has taken place? The attacker is behind the goalkeeper, in the opponents half of the field. In their opponents' half of the field, involved in active play, closer to the goal line then the 2nd-to-last defender or ball. Where the player was at the time the goal kick was taken. In their own half of the field, involved in active play, closer to the goal line then the 2nd-to-last defender or the ball. Time's up