▁a ▁single ▁number ) ▁for ▁uniform s ▁around ▁the ▁same ▁time , ▁but ▁players ▁Jim ▁Otto ▁and ▁Ken ▁B urr ough ▁used ▁the ▁number ▁throughout ▁the ▁ 1 9 7 0 s . ▁ ▁The ▁National ▁Hot ▁Rod ▁Association ▁is ▁enfor cing ▁a ▁grand father ▁clause ▁b anning ▁energy ▁drink ▁spons ors ▁from ▁entering ▁the ▁sport ▁if ▁they ▁were ▁not ▁spons oring ▁cars ▁as ▁of ▁April ▁ 2 4 , ▁ 2 0 0 8 , ▁purs u ant ▁to ▁the ▁five - year ▁extension ▁of ▁its ▁spons or ship ▁with ▁C oca - Col a , ▁which ▁is ▁changing ▁the ▁title ▁spons or ship ▁from ▁Pow erade ▁to ▁Full ▁Th rott le ▁Energy ▁Dr ink . ▁ ▁Even ▁though ▁to b acco ▁advert ising ▁in ▁car ▁racing ▁was ▁b anned , ▁the ▁Mar l bor o ▁cig aret te ▁brand , ▁owned ▁by ▁British ▁American ▁Tob acco ▁in ▁Canada , ▁and ▁Philip ▁Morris ▁International ▁elsewhere , ▁is ▁grand father ed ▁in ▁to ▁spons oring ▁a ▁car ▁in ▁the ▁F 1 ▁series ▁on ▁the ▁agreement ▁that ▁the ▁name ▁is ▁not ▁shown ▁in ▁places ▁that ▁b anned ▁it . ▁ ▁NAS C AR ▁allows ▁some ▁grand father ed ▁spons or ships ▁by ▁energy ▁drink ▁br ands ▁in ▁the ▁top - level ▁Mon ster ▁Energy ▁Cup ▁Series , ▁while ▁rules ▁prohib it ▁new ▁spons ors ▁in ▁that ▁category . ▁Similar ▁policies ▁with ▁regard ▁to ▁tele communic ations ▁companies ▁were ▁in ▁effect ▁when ▁the ▁series ▁was ▁spons ored ▁by ▁S print . ▁Additionally , ▁some ▁ins