[classicman]

For a throw-in to be legal: (a) the ball must be thrown from behind & over the head (b) it must be thrown using both hands (c) the thrower must face the field (d) at the instant the ball leaves the thrower's hands, some part of both feet must be on the ground.

An opponent must stay at least 2 meters from the thrower. Penalized by a yellow card - - - Or a friggin soccer ball thrown to the face.

Now the question come in - is it 2 meters from where the thrower started or the point from which he releases the ball. Its been a long time for me, but I believe its the line or thats what we used as the rule.