If an emissions control system has been removed from a vehicle, how should this be entered into the BAR 97 EIS?

When an emissions control system has been removed from a vehicle, entering it as "Missing" in the BAR 97 EIS accurately reflects the status of the emissions system. This designation indicates that the necessary components designed to control emissions are no longer present in the vehicle, which is critical for compliance and reporting purposes.

Selecting "Missing" confirms that the vehicle does not meet the required emissions standards due to the absence of these components. This classification is fundamental in ensuring that proper actions can be taken, whether that involves notifying the owner regarding the necessary repairs, informing authorities, or making sure that the vehicle is ineligible for passing emissions testing until the required systems are restored.

In contrast, the other options would not accurately represent the scenario. "Replaced" implies that the original components were removed and substituted with new ones, which is not the case here. "Modified" suggests that the emissions system has been altered but still exists in some form, which does not apply if it's completely removed. "Installed" would indicate that emissions control systems are currently present and functioning in the vehicle, which contradicts the situation of their removal. Therefore, "Missing" is the most suitable choice for scenario clarity and compliance.