1. Is there a proper way as an AR to signal the center referee over?
2. When an AR feels a necessity for a player to become carded, what way is the AR suppose to let the center referee know?
USSF answer (July 6, 2009):
This is a matter to be discussed in the pregame conference. Normal procedure for dealing with situations of that nature are:
1. Stand at attention.
2. Stand at attention; when the referee looks over, indicate by patting the chest that a card is necessary.