Know Your Rights CDL PENALTIES FOR ‘DUI’ IN YOUR OWN CAR Improvement Act of 1999 (MCSIA) revised the Commercial Drivers License (CDL) standards imposing harsher disqualification standards. Among its revisions, the Act requires CDL holders to be disqualified if they are convicted of adrug or alcohol- related offense, such as driving under the influence, committed while operating a non-Commercial Motor Vehicle (CMV).