The beneficiary rule, commonly referred to as the "lucky dog" or "free pass", is a rule in some motor racing leagues allowing the closest lapped driver to the front of the field to gain back a lap when a caution is called. The driver is called to move to the end of the longest line of the cars at the end of that caution period. This rule was instituted to prevent drivers from racing back to the start/finish line when a caution was called.