Does law enforcement have probable cause to stop a vehicle with an out of state license plate for a window tint violation?

Law enforcement can stop a vehicle for a window tint violation if they have probable cause to believe the tint is illegal under state law, regardless of the vehicle's out-of-state license plate. Probable cause is established if the officer visually observes that the tint appears to be darker than legal limits or if the vehicle has been flagged for similar violations. However, the specifics of the law can vary by state, so the officer must be familiar with both their own state's regulations and those of the state where the vehicle is registered.