In order to prevent double taxation, non-taxation or distortion of competition, Member States may, with regard to services the place of supply of which is governed by Articles 44, 45, Article 54(1), second subparagraph, and Articles 56, 58 and 59:
(a) consider the place of supply of any or all of those services, if situated within their territory, as being situated outside the Community if the effective use and enjoyment of the services takes place outside the Community;
(b) consider the place of supply of any or all of those services, if situated outside the Community, as being situated within their territory if the effective use and enjoyment of the services takes place within their territory.