1. By 21 October 2017, Member States shall communicate to the Commission and the other Member States in accordance with Annex II and using the relevant form the types of gas and corresponding supply pressures of gaseous fuels used on their territory. They shall communicate any changes thereof within six months after the announcement of the envisaged changes.
2. The Commission shall be empowered to adopt delegated acts in accordance with Article 41 concerning modifications to the content of the Member States' communications of the gas supply conditions on their territory, as set out in Annex II, in order to take into account the technical developments with regard to the gas supply conditions.
3. The Commission may, by means of implementing acts, define the harmonised form of the Member States' communications referred to in paragraph 1 of this Article. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 42(3).
4. The Commission shall ensure that the information provided by Member States in accordance with paragraph 1 is published in the Official Journal of the European Union.