A DUI offense, or Driving Under the Influence offense, occurs when a person operates a vehicle while impaired by alcohol or drugs. This impairment can affect a driver's ability to make safe decisions, react quickly, and maintain control of the vehicle. Laws regarding DUI vary by state, but they generally involve legal limits for blood alcohol concentration (BAC) and penalties for violations. Consequences of a DUI offense can include fines, license suspension, mandatory alcohol education programs, and even jail time. Repeat offenders often face harsher penalties. Additionally, a DUI conviction can lead to increased insurance rates and a permanent mark on a person's driving record.