Where services covered by the first subparagraph of Article 56(2) or Articles 58 and 59 of Directive 2006/112/EC are supplied to a non-taxable person who is established in more than one country or who has his permanent address in one country and his usual residence in another, priority shall be given:

(a) in the case of a non-taxable legal person, to the place referred to in point (a) of Article 13a of this Regulation, unless there is evidence that the service is used at the establishment referred to in point (b) of that article;

(b) in the case of a natural person, to the place where he usually resides, unless there is evidence that the service is used at his permanent address.