What indication on a registration card means a vehicle must undergo emissions testing?

The indication on a registration card that means a vehicle must undergo emissions testing is "Emissions Inspection Required/Diesel Vehicle Exempt." This statement clearly signifies that there is a requirement for emissions testing for most vehicles, except for those specifically noted as exempt, in this case, diesel vehicles.

When a vehicle registration card includes this designation, it implies that the vehicle owner must comply with state emissions testing regulations, ensuring that the vehicle meets the necessary environmental standards. This is crucial for maintaining air quality and reducing pollution from motor vehicles.

The other options do not fulfill the requirement for emissions testing as indicated by their language. The second option suggests that the vehicle is completely exempt from emissions testing due to its classification as a heavy-duty vehicle. The third option indicates that testing is required, but it does not specify any exemptions, which could create confusion depending on the vehicle type. The final option asserts that the vehicle is registered and compliant, but it does not mention emissions testing, suggesting there is no requirement. Hence, the first option best communicates the need for emissions testing for the specified vehicles.