Article 44
The place of supply of services by an intermediary acting in the name and on behalf of another person, other than those referred to in Articles 50 and 54 and in Article 56(1), shall be the place where the underlying transaction is supplied in accordance with this Directive. However, where the customer of the services supplied by the intermediary is identified for VAT purposes in a Member State other than that within the territory of which that transaction is carried out, the place of the supply of services by the intermediary shall be deemed to be within the territory of the Member State which issued the customer with the VAT identification number under which the service was rendered to him.