Certain Delaware drunk driving penalties are applicable if you are caught while driving a car under the influence of alcohol or while ability impaired. In the state of Delaware, it is illegal to drive a vehicle with a BAC (blood alcohol concentration) of 0.08 or higher. However, it is important to note that the permissible BAC limit for commercial drivers is 0.04 while for drivers under 21 years of age, the limit is only 0.02. As per the Implied Consent Law applicable in this state, the officers who stop you under dui charges do not need to seek your permission to conduct the required chemical test of urine, breath, or blood. If you refuse to take the test, the officers have the legal right to take “reasonable” actions (that includes physical force) to conduct the tests. Refusal to take dui chemical tests will result in automatic revocation of your driver’s license.