Driving a Commercial Motor Vehicle While Under the Influence of Alcohol

Committing any one or more of the following acts in a commercial motor vehicle (CMV): driving a CMV while the person's alcohol concentration is 0.04 percent or more; driving under the influence of alcohol, as prescribed by State law; or refusal to undergo such testing as is required by any State or jurisdiction in the enforcement of 49 CFR 383.51b)2)(i)a) or b), or 49 CFR 392.5a)2). (49CFR383) (49CFR390)