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18 U.S.C. § 343

Title 18Chapter 17Current through PL 116-220~1 min readLast updated: March 30, 2026View on OLRC →
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§ 343. Presumptions

For purposes of this chapter—

  • (1) an individual with a blood alcohol content of .10 percent or more shall be presumed to be under the influence of alcohol; and
  • (2) an individual shall be presumed to be under the influence of drugs if the quantity of the drug in the system of the individual would be sufficient to impair the perception, mental processes, or motor functions of the average individual.

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