Article 326

(ex Articles 27a to 27e, 40 to 40b and 43 to 45 TEU and ex Articles 11 and 11a TEC)

Any enhanced cooperation shall comply with the Treaties and Union law.

Such cooperation shall not undermine the internal market or economic, social and territorial cohesion. It shall not constitute a barrier to or discrimination in trade between Member States, nor shall it distort competition between them.