Even though you can't see that CB on the Tank Driver Ribbon on non Tank Crew soldiers, you can in fact unlock the CB on a non-Tank Crew soldier by simply stealing and driving around in tanks, unlocking the corresponding Ribbon Ranks.
TANK THIEF | Ribbon Rank | |
---|---|---|
Studying armor ignition systems enables you to steal enemy tanks faster. | ||
Faster unlock of tanks | ||
33% Faster | 4 | |
100% Faster | 8 | |
300% Faster | 10 |