Final answer:
For individuals younger than 21, it is usually illegal to drive with a BAC of 0.02% or higher. This is related to the National Minimum Drinking Age Act and efforts by organizations like MADD to minimize dru nk driving.
Step-by-step explanation:
For individuals younger than 21, it is illegal to drive with a Blood Alcohol Concentration (BAC) of 0.02% or higher in many states, although this can vary slightly depending on local laws. The National Minimum Drinking Age Act of 1984 plays a crucial role in establishing legal drinking and driving standards by requiring states to raise their drinking age to twenty-one, thus affecting BAC limits for younger drivers. Organizations such as Mothers Against Dru nk Driving (MADD) advocate for these laws to prevent alcohol-related accidents. It's important to note the legal limit for intoxication in general is a BAC of 0.08%, but for those under 21, any detectable amount of alcohol can result in DUI charges due to zero tolerance laws.