[Mark T. DeNucci, Sr.]

Just because the restraining line is not shown on the court the restraining line still exists and must be enforced for the boundary line where the throw-in is being made. Yes, it should be covered in your pregame conference with your partner/s and at the pregame conference with the captains and coaches. I know that there has been a casebook play in the past that states that whether or not the restraining line is drawn on the court it exists and must be used.

You cannot just forget it if it isn't drawn. But the only time you need to worry about it is when the team making the throw-in is being defended.