For non-commercial drivers, the legal blood alcohol content (BAC) limit is 0.08. For commercial drivers, the legal limit is 0.04 BAC. Notwithstanding these limits, a police officer may still consider a driver who falls below the legal BAC limit impaired if the driver shows other signs of intoxication. An officer may charge a driver with a BAC between 0.05 and 0.07 with “driving while ability impaired by alcohol.