What is the BAC limit for individuals younger than 21 years old in Texas?

In Texas, individuals younger than 21 years old are not legally allowed to operate a motor vehicle with any detectable amount of alcohol in their system. This is mandated by the Zero Tolerance Law, which is designed to reduce underage drinking and driving incidents. The implication of this law is that even the smallest amount of alcohol, which could be below what is considered a typical legal limit for adult drivers (such as 0.08%), is sufficient for prosecution. This strict standard reflects the state's commitment to minimizing risks associated with underage drinking and promoting safety on the roads.

The other options represent blood alcohol concentration (BAC) levels that apply to individuals aged 21 and older, which is considered the legal drinking age. Thus, while a BAC limit of 0.08% is standard for adults, it doesn't apply to those under 21, reinforcing the importance of the Zero Tolerance policy.