15. This Article shall be without prejudice to the Commission’s right to adopt and amend the guidelines as laid down in Article 74. It shall be without prejudice to the possibility for the ENNOH to develop non-binding guidance in the areas set out in paragraphs 1 and 2 of this Article where such guidance does not relate to areas covered by a request addressed to the ENNOH by the Commission. The ENNOH shall submit any such guidance to ACER for an opinion and shall duly take that opinion into account.