Most people understand what a DUI means and how and why they are received. However, referencing DUI laws in terms of being 'per se' tends to confuse some people. The term per se is used to describe something in and of itself. In reference to DUI cases, per se laws essentially establish that as far as the law is concerned an individual is intoxicated at a BAC of 0.08. The general belief is that no other evidence aside from and over the limit BAC is needed to establish intoxication.