 When a new title sponsor creates conflicts with existing team sponsors, NASCAR typically allows the team sponsors to remain under a grandfather clause.The rule is named after the British cigarette brand Viceroy, and is in reference to the 1972 USAC Championship Car season during which title sponsor Marlboro renounced its branding when Viceroy entered the sport to sponsor entries.The rule has come into effect on several occasions, most notably when Nextel Communications signed a ten-year $700 million deal to replace Winston as the Cup Series sponsor.