Final answer:
It is illegal for someone on DUI probation to drive with a BAC of 0.01% or higher, significantly lower than the usual legal intoxication limit of 0.08%.
Step-by-step explanation:
It is illegal for a person who is on a Driving Under the Influence (DUI) probation to drive with a blood alcohol concentration (BAC) that is 0.01% or higher. This limit is much lower than the typical 0.08% BAC level that is considered legally intoxicated for drivers who are not on probation and are age 21 or older. The lowered threshold for individuals on DUI probation emphasizes the seriousness with which the law views driving after consumption of any alcohol by those with a history of DUI.
The Breathalyzer is a device that measures the ethanol concentration in a person's breath and is a common tool for law enforcement to assess BAC. Additionally, each individual metabolizes alcohol at a different rate which is why the BAC can vary greatly between persons even if the same amount of alcohol is consumed. The legal limit for intoxication typically refers to a BAC of 0.08%, which, according to the rate at which alcohol is metabolized, would require at least five hours for a legally intoxicated person to return to sobriety.