a) garantera betalning av punktskatt på de villkor som fastställts av skattemyndigheterna i hans medlemsstat, utan att det påverkar tillämpningen av artikel 15.4, ###>(a) guarantee payment of excise duty under the conditions set by the tax authorities of his Member State, without prejudice to Article 15 (4) laying down the liability of the authorized warehousekeeper of dispatch and, if the case arises, of the transporter;