Article 245
1. For the purposes of this Directive, the taxable person may decide the place of storage of all invoices provided that he makes the invoices or information stored in accordance with Article 244 available to the competent authorities without undue delay whenever they so request. 2. Member States may require taxable persons established in their territory to notify them of the place of storage, if it is outside their territory. Member States may also require taxable persons established in their territory to store within that territory invoices issued by themselves or by their customers or, in their name and on their behalf, by a third party, as well as all the invoices that they have received, when the storage is not by electronic means guaranteeing full on-line access to the data concerned.