What is an implication of the zero-tolerance law for drivers under 21?

The implication of the zero-tolerance law for drivers under 21 is that they have a very low limit of Blood Alcohol Concentration (BAC). This law is designed to deter underage drinking and driving by enforcing stricter rules than those applied to adult drivers. Under this law, drivers under the age of 21 can face legal penalties if they have any measurable alcohol in their system, typically defined as a BAC of 0.02 or even lower in some jurisdictions. This significantly reduces the allowable alcohol consumption for younger drivers, reinforcing the importance of safe driving habits and minimizing the risks associated with impaired driving.

In contrast, adult drivers have a higher legal limit of a BAC of 0.08, making the restrictions on underage drivers much more stringent in an effort to promote safety. The other options presented do not align with the principles of the zero-tolerance law, which is specifically aimed at prohibiting alcohol use among drivers under the legal drinking age.