Criminal law section 185-3 prohibits drunk driving. Since the legislation of the crime has been created, it has constantly been modified, and the penalty has continuously increased. In the new revised provisions of June 2013, the legislators provided clear and binding criteria about the alcohol concentration. But the breath test has its unreliability. Even though determined by legislation, there should be space for free evaluation of evidence for the judges. As for blood alcohol concentration, you can refer to the German practice, as long as the method of investigation in accordance with legal evidence to confirm that it has more than 110 millilitres, the court must consider the driver is not able to drive safely.