“1. Where an irregularity or offence has been committed in the course of a movement involving the chargeability of excise duty, the excise duty shall be due in the Member State where the offence or irregularity was committed from the natural or legal person who guaranteed payment of the excise duties in accordance with Article 15(3), without prejudice to the bringing of criminal proceedings. Where the excise duty is collected in a Member State other than that of departure, the Member State collecting the duty shall inform the competent authorities of the country of departure. 2. When, in the course of movement, an offence or irregularity has been detected without it being possible to determine where it was committed, it shall be deemed to have been committed in the Member State where it was detected. 3. Without prejudice to the provision of Article 6(2), when products subject to excise duty do not arrive at their destination and it is not possible to determine where the offence of irregularity was committed, that offence or irregularity shall be deemed to have been committed in the Member State of departure, which shall collect the excise duties at the rate in force on the date when the products were dispatched unless within a period of four months from the date of dispatch of the products evidence is produced to the satisfaction of the competent authorities of the correctness of the transaction or of the place where the offence or irregularity was actually committed. Member States shall take the necessary measures to deal with any offence or irregularity and to impose effective penalties.”