DWLR will be an infraction unless it is during the active revocation period.  Let's say someone has a revoked license and never goes to DMV to get it renewed.  Now they get caught driving.  Currently they have to go to court and fix it or face suspended or actual jail time.  This ensures we have licensed drivers without convicting anyone of a crime (because it's reduced to a violation).  
After SB 91 they will get a traffic ticket (infraction).  Sections 92 and 93 of the bill if you don't believe me.