At what blood alcohol level is a person presumed to be under the influence of intoxicating liquor?

The correct blood alcohol level at which a person is presumed to be under the influence of intoxicating liquor is 0.08 grams. This threshold is widely recognized and is used as the standard for legal intoxication in many jurisdictions. At this level, a person's ability to operate a vehicle safely is significantly impaired, leading to an increased risk of accidents and endangering public safety.

While 0.02 grams may indicate some level of impairment, it is generally not recognized as the legal standard for determining intoxication. Therefore, individuals could display minor signs of impairment at this level, but it does not meet the criteria for being legally presumed under the influence in most contexts. Understanding these limits is crucial for airport managers and others in safety-sensitive positions, as they must enforce regulations that ensure the safety and security of the public.