How the call is made
- Check whether the defender got to the spot with legal guarding position before the contact.
- Judge whether the defender moved laterally or backward legally, or instead slid into the path too late.
- Identify the point of contact and which player caused the displacement.
- Ask whether the play is inside a restricted-area rule that limits charge calls on help defenders.
- If the offense created illegal contact against an established defender, it can be a charge. If the defender was late or out of position, it is more likely a block.