When the ball goes out-of-bounds and the official responsible for the line is not certain
which player last touched the ball (Diagram 85), he will blow his whistle, give the signal
to stop the game clock, and then look for help from his partner (Diagram 86).
If the other official knows which player last touched the ball before going out-ofbounds,
he will, without blowing his whistle, give the direction of play according to the
method of communication established during the pre-game conference. The official
responsible for the line will then indicate the direction of play (Diagram 87).
In Diagram 88, both officials are in doubt as to which team should take the throw-in. In
this case, they should both use the thumbs-up signal indicating a jump ball situation,
followed by the direction of play signal.
The alternating possession throw-in shall be taken at the place nearest to where the
ball went out-of-bounds.