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A. It shall be unlawful for any person to drive or operate any commercial motor vehicle (i) while such person has a blood alcohol concentration of 0.08 percent or more by weight by volume or 0.08 grams per 210 liters of breath as indicated by a chemical test administered as provided in this article; (ii) while such person is under the influence of alcohol; (iii) while such person is under the influence of any narcotic drug or any other self-administered intoxicant or drug of whatsoever nature, or any combination of such drugs, to a degree which impairs his ability to drive or operate any commercial motor vehicle safely; (iv) while such person is under the combined influence of alcohol and any drug or drugs to a degree which impairs his ability to drive or operate any commercial motor vehicle safely; or (v) while such person has a blood concentration of any of the following substances at a level that is equal to or greater than: (a) 0.02 milligrams of cocaine per liter of blood, (b) 0.1 milligrams of methamphetamine per liter of blood, (c) 0.01 milligrams of phencyclidine per liter of blood, or (d) 0.1 milligrams of 3,4-methylenedioxymethamphetamine per liter of blood. B. It shall be unlawful and a lesser included offense of an offense under provision (i), (ii), or (iv) of subsection A of this section for a person to drive or operate a commercial motor vehicle while such person has a blood alcohol concentration of 0.04 percent or more by weight by volume or 0.04 grams or more per 210 liters of breath as indicated by a chemical test administered in accordance with the provisions of this article. 1989, c. 705, § 46.1-372.23; 1992, c. 830; 1994, cc. 359 , 359 ; 2005, c. 359 .
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