Article 3U.K.

The Member State which has granted type approval shall take the necessary measures to ensure that it is informed of any modification of a part or characteristic referred to in [F1item 1.1] of Annex I. The competent authorities of that Member State shall decide whether fresh tests should be carried out on the [X1modified vehicle type] and a fresh report drawn up. Where the tests reveal failure to comply with this Directive, the modification shall not be approved.