How should a vehicle be marked if it has retread tires?

A vehicle with retread tires must be marked specifically for retreading to ensure compliance with safety regulations. This marking helps to clearly communicate that the tires have been retreaded, which is important for inspection purposes and for subsequent drivers, as retread tires can have different performance characteristics compared to new tires. Proper marking aids law enforcement and inspection personnel in immediately recognizing the tire type, thus ensuring that all safety measures are observed.

The other options do not provide the specific indication required. Simply placing a sticker on the rear window does not convey the necessary details regarding tire safety and type. Noting it on the registration is insufficient for quick identification during inspections. Lastly, stating that no mark is needed fails to address the regulations surrounding tire safety and vehicle markings.