DUI & Driving Under The Influence:
DUI Driving Drunk :
But the law was changed and changed again - strengthened, in fact, to be less tolerant of multiple convictions. But a provision that stipulated four convictions in five years was inadvertently left in. The high court indicated that it had little choice. It could not consider seven convictions in 15 years as constituting four in five years.

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DUI Blood Alcohol Content :
BAC is most conveniently measured as a simple percent of alcohol in the blood by weight. It does not depend on any units of measurement. In Europe it is usually expressed as milligrams of alcohol per 100 millilitres of blood. However, 100 milliliters of blood weighs essentially the same as 100 milliliters of water, which weighs precisely 100 grams. Thus, for all practical purposes, this is the same as the simple dimensionless BAC measured as a percent. Since 2002 it has been illegal in all 50 US states to drive with a BAC that is 0.08% or higher.

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