1. The undertakings referred to in Article 1 shall assemble the data provided for in Article 1(1) and (2) on 1 January and 1 July of each year. These data, drawn up in conformity with the provisions referred to in Article 3, shall be sent to Eurostat and the competent authorities of the Member States within two months.
2. On the basis of the data referred to in paragraph 1, Eurostat shall publish each May and each November, in an appropriate form, the prices of gas and electricity for industrial users in the Member States and the pricing systems used to that end.
3. The information provided for in Article 1(3) shall be sent every two years to Eurostat and to the Member States’ competent authorities. This information shall not be published.