Which statement about 'Green Cards' is accurate?

The statement regarding 'Green Cards' that accurately reflects their purpose is that they provide coverage for driving internationally. A Green Card is an internationally recognized certificate of insurance that proves that the driver has the minimum required third-party liability insurance cover mandated by the country they are visiting. This card facilitates travel across borders, ensuring that drivers are compliant with the automobile liability requirements of the countries in which they operate.

In contrast, the other statements do not align with the accurate portrayal of Green Cards. They are not limited to personal transport only, as they can also be relevant for commercial vehicles. Additionally, they are not exclusive to the UK; rather, they apply to multiple countries, particularly those that are part of the Green Card system within Europe and beyond. Lastly, while comprehensive insurance policies may offer broader coverage, the requirement for a Green Card is more related to the basic liability coverage that must be met for international driving, regardless of whether the policy is comprehensive or third-party only.