▁the ▁yellow ▁flag ▁comes ▁out ▁at ▁any ▁time ▁during ▁the ▁restart , ▁each ▁subsequent ▁restart ▁will ▁be ▁a ▁two - lap ▁restart . ▁ ▁( From ▁ 1 9 9 5 ▁until ▁mid - 1 9 9 8 ▁and ▁again ▁since ▁ 2 0 0 3 , ▁racing ▁back ▁to ▁the ▁ca ution ▁was ▁prohib ited ▁in ▁the ▁series .) ▁ ▁However , ▁if ▁on ▁the ▁restart , ▁there ▁will ▁be ▁just ▁one ▁scheduled ▁lap ▁remaining , ▁there ▁is ▁a ▁green ▁and ▁white ▁flag ▁restart ▁for ▁the ▁lap . ▁That ▁rule ▁was ▁implemented ▁a ▁few ▁times . ▁ ▁In ▁the ▁middle ▁of ▁the ▁ 1 9 9 8 ▁season , ▁however , ▁a ▁rule ▁change ▁by ▁NAS C AR ▁affected ▁the ▁rule ; ▁ ▁if ▁the ▁yellow ▁flag ▁comes ▁out ▁during ▁the ▁final ▁lap ▁of ▁the ▁race , ▁the ▁tr uck s ▁would ▁race ▁to ▁the ▁finish . ▁ ▁( In ▁the ▁middle ▁of ▁the ▁ 1 9 9 8 ▁season , ▁as ▁NAS C AR ▁elimin ated ▁the ▁two - segment ▁races , ▁NAS C AR ▁permitted ▁the ▁tr uck s ▁to ▁race ▁to ▁the ▁ca ution .) ▁ ▁That ▁rule ▁was ▁elimin ated ▁in ▁September ▁ 2 0 0 3 ▁as ▁a ▁result ▁of ▁the ▁ban ▁on ▁racing ▁back ▁to ▁the ▁ca ution ▁following ▁a ▁dangerous ▁incident ▁in ▁L oud on . ▁ ▁In ▁a ▁July ▁ 2 0 0 4 ▁race ▁at ▁Gate way ▁International ▁Race way , ▁multiple ▁green - white - check ered ▁rest arts ▁resulted ▁in ▁a