Drunk driving charges pose problems for adults. When a person who hasn't yet turned 21 years old opts to drive after drinking alcohol, the problems that they can face are often very serious. Zero-tolerance laws mean that a person who is under 21 can face legal issues even if they have a blood-alcohol concentration that is below the .08 percent that is the limit for adults.
For people who are under the legal drinking age, the limit for BAC is .02 percent in South Carolina. This means that the limit is a lot lower. In some cases, even something like a glass of wine might lead to criminal charges if you are under 21 and drive after having that wine.