3. The Commission shall, after consulting ACER, the ENNOH and, where relevant, the ENTSO for Gas or the EU DSO entity, as well as other relevant stakeholders, establish, every three years, a priority list, identifying the areas set out in paragraphs 1 and 2 of this Article to be included in the development of network codes. The Commission shall establish the first priority list for the development of hydrogen network codes within one year of the establishment of the ENNOH as provided for in Article 57.