Each Member State shall ensure that, where an accident is caused in its territory by a vehicle normally based in the territory of another Member State, the national insurers' bureau shall, without prejudice to the obligation referred to in Article 2(a), obtain information:
(a) as to the territory in which the vehicle is normally based, and as to its registration mark, if any;
(b) in so far as is possible, as to the details of the insurance of the vehicle, as they normally appear on the green card, which are in the possession of the person having custody of the vehicle, to the extent that those details are required by the Member State in whose territory the vehicle is normally based.
Each Member State shall also ensure that the bureau communicates the information referred to in points (a) and (b) to the national insurers' bureau of the State in whose territory the vehicle referred to in the first paragraph is normally based.