Prior to the game, our crew walks through the players during warm-ups and addresses any illegal items and we look for missing pads that they're required to wear. By doing this, we avoid a lot of problems before the game starts.
At the pre-game conference, we tell the head coach that if a player comes onto the field with his jersey untucked, we're going to send him back to the sideline. So don't be surprised if or when it happens.
If I spot illegal items after the game, I tell the player to remove them. This can happen as more and more teams in our area go back to the locekr room before the coin toss.
If I find missing pads after the game starts, it's a USC foul on the head coach and 15 yards.