1.Each Member State shall determine the period throughout which taxable persons must ensure the storage of invoices relating to the supply of goods or services in its territory and invoices received by taxable persons established in its territory.
2.In order to ensure that the conditions laid down in Article 246 are met, the Member State referred to in paragraph 1 may require that invoices be stored in the original form in which they were sent or made available, whether paper or electronic. Additionally, in the case of invoices stored by electronic means, the Member State may require that the data guaranteeing the authenticity of the origin of the invoices and the integrity of their content, as provided for in the first paragraph of Article 246, also be stored.
3.The Member State referred to in paragraph 1 may lay down specific conditions prohibiting or restricting the storage of invoices in a country with which no legal instrument exists relating to mutual assistance similar in scope to that provided for in Directive 76/308/EEC and Regulation (EC) No 1798/2003 or to the right referred to in Article 249 to access by electronic means, to download and to use.