1 9 7 5 ▁Car m ign ano ▁was ▁the ▁first ▁DO C ▁to ▁be ▁awarded ▁official ▁san ction ing ▁for ▁the ▁use ▁of ▁Cab ern et ▁in ▁the ▁bl end . ▁While ▁the ▁early ▁" Super ▁T usc ans " ▁of ▁the ▁late ▁ 2 0 th ▁century ▁which ▁included ▁Sang i ov ese - C ab ern et ▁bl ends ▁had ▁to ▁be ▁re leg ated ▁to ▁the ▁low ly ▁v ino ▁da ▁t av ola ▁or ▁" table ▁wine " ▁design ation , ▁DO C ▁( and ▁later ▁DO CG ) ▁Car m ign ano ▁wine ▁was ▁being ▁produced ▁with ▁full ▁legal ▁san ction ing . ▁ ▁DO CG ▁reg ulations ▁ ▁The ▁Car m ign ano ▁DO CG ▁zones ▁covers ▁roughly ▁ ▁of ▁plant ed ▁land ▁producing ▁nearly ▁ 7 1 , 5 0 0 ▁gall ons ▁( 2 , 7 0 0 ▁h l ) ▁of ▁DO CG ▁wine ▁a ▁year . ▁Current ▁DO CG ▁reg ulations ▁mand ate ▁that ▁Sang i ov ese ▁must ▁const itute ▁at ▁least ▁ 5 0 % ▁of ▁the ▁bl end , ▁allowing ▁up ▁to ▁ 1 0 – 2 0 % ▁Cab ern et ▁Sau v ignon ▁or ▁Cab ern et ▁Franc , ▁up ▁to ▁ 2 0 % ▁C ana i olo ▁N ero , ▁up ▁to ▁ 5 % ▁M amm olo ▁and ▁Color ino ▁as ▁well ▁as ▁up ▁to ▁ 1 0 % ▁white ▁gra pe ▁vari eties ▁like ▁Tre bb iano ▁or ▁Mal vas ia ▁to ▁make