A DUI (driving under the influence) conviction can lead to a lifetime of problems for drivers, as the consequences of a DUI conviction can be severe. Although each state has its own set of DUI laws, most follow similar guidelines. To be convicted of a DUI, the national 'per se' law states that a driver must have a blood alcohol content (BAC) of .08%. This does not mean that a driver must be drunk, but simply above the BAC limit. From there, the consequences for a DUI can range from mild for first time, non-major offenders, to extremely serious for those with prior records, who had an extremely high BAC or who caused major accidents or fatalities. As such, it is important to establish a DUI defense immediately following a DUI arrest, especially since many states begin the penalty process right away. The counsel of specialty DUI lawyers is highly recommended, as they work with a state's DUI legal system daily, and know how to build a solid DUI defense. From the techniques used to determine a person's BAC, to any plea bargains or even the chance of flat-out dismissals, a good lawyer will question and explore all legal options in building a driver's case.