Article 53
1. For the application of Article 192a of Directive 2006/112/EC, a fixed establishment of the taxable person shall be taken into consideration only when it is characterised by a sufficient degree of permanence and a suitable structure in terms of human and technical resources to enable it to make the supply of goods or services in which it intervenes.
2. Where a taxable person has a fixed establishment within the territory of the Member State where the VAT is due, that establishment shall be considered as not intervening in the supply of goods or services within the meaning of point (b) of Article 192a of Directive 2006/112/EC, unless the technical and human resources of that fixed establishment are used by him for transactions inherent in the fulfilment of the taxable supply of those goods or services made within that Member State, before or during this fulfilment.
Where the resources of the fixed establishment are only used for administrative support tasks such as accounting, invoicing and collection of debt-claims, they shall not be regarded as being used for the fulfilment of the supply of goods or services.
However, if an invoice is issued under the VAT identification number attributed by the Member State of the fixed establishment, that fixed establishment shall be regarded as having intervened in the supply of goods or services made in that Member State unless there is proof to the contrary.