http://sports.yahoo.com/sow/news?slug=reu-fifaoffside&prov=reuters&type=lgns Seems there's more clarification issued on the topic of "passive offside." The main difference from the way I've seen the game usually called is that it seems the fact that the ball is heading in your direction is no longer sufficient to be considered offside. You need to actually play or touch the ball to be called for offside. As pointed out, this can result in a delay before the flag is raised. The linesman may have to wait until the attacking player tracks down a ball and touches or plays it before calling him offside. I recently saw a play where a corner kick was sent back to a teammate who proceeded to dribble down the sideline toward the same corner. The corner kick taker was then in an offside position, and although the dribbler pushed the ball forward for himself (rather than passing to the offside corner kick taker), the fact that it went in the general proximity of his teammate (who made no indications of attempting to play the ball) resulted in a raised flag. Seems that according to the new directives, that shouldn't happen.