Beside this, can you get pulled over for flagged tags?
If a city police or California Highway Patrol officer sees expired tags on a vehicle, they can, and will, ticket it. The DMV doesn't conduct enforcement efforts for expired tags but if you're caught, you'll face a fine and penalties.
Subsequently, question is, what does it mean if your car is marked by police? A police marker is basically a big red bullseye that is registered on the Police National Database (PND) against the vehicle's registration plate. It indicates the vehicle may be of interest to them and therefore the police are much more likely to pull it over.
Considering this, is it illegal to drive with a flag on your car?
Question: Oftentimes, trucks and other vehicles will have large flags either mounted in the bed or attached to the side of the vehicle. In most cases, there is nothing illegal about these flags and they are easily found in several locations attached to personal vehicles.
What does a flag on registration mean?
The flag will prevent the renewal or issuance of a plate and/or registration on the vehicle.