AP Throw-in or Not (Fed rules)

[McMac]

But 9-2-10 says: the opponent(s) of the thrower shall not have any part of his/her through the inbounds side of the throw-in boundary-line plane until the ball has been released on a throw-in pass.

And under penalty: The first violation of the throw-in boundary-line plane by an opponent(s) of the thrower shall result in a team warning for delay being given (one warning per team per game).

Nothing in this goes against the provision of 6-5-4.