A person may be rewarded with Arizona drunk driving penalties if he/she is found driving under certain circumstances, such as driving with BAC level of 0.08 or more (within two hours of driving) or with the metabolite of any illegal drug in his/her body. The permissible BAC limit for commercial drivers is 0.04. Arizona is one of those few states that have specific laws and penalties for those charged under “extreme dui”. Following is a brief rundown on it.