Why do ovi offenders have to have yellow licence plates when a sexual predator only has to register?

The requirement for yellow license plates for DUI offenders is a specific state law aimed at helping law enforcement easily identify them on the road to monitor and deter repeat offenses. Sexual predators, on the other hand, are required to register as part of a national sex offender database to keep track of their whereabouts and activities, but they do not have a similar visible marker on their vehicles.