Louisiana takes a conservative approach to DUIs (referred to as DWI or OWI in Louisiana). This includes mandatory jail time for first offenders (which is often served out by performing community service). Below are the penalties for adult first offenders with a valid, private driver’s license. Penalties are more severe if the driver's BAC is above .15 or worse, if over .20%.
In Louisiana there are two important time periods for determining what is a second offense (known as a look back or wash out period). The period is ten years when a judge reviews an offender’s record for assessing criminal penalties such as fines and jail time. The period is five years for administrative purposes such as license suspensions.
A third offense DUI (also referred to as a DWI) is measured by an important time period – ten years -- known (known as the look back or wash out period) -- that is, if this is your third DUI within ten years, you will be subject to certain criminal penalties, as explained below
Sobriety checkpoints are legal in Louisiana (see 764 So. 2d 64 (La. 2000)). These checkpoints (also referred to as "mobile checkpoints" or "roadblocks") are police traffic stops that are not tied to any specific or individual suspicions.