The participating and parent undertakings referred to in the second and third paragraphs of Article L. 356-2 respectively shall set up appropriate structures and systems at group level to meet the requirements set out in Articles L. 355-2, L. 355-3 and L. 356-21 and Article L. 612-24 of the Monetary and Financial Code. Pursuant to the provisions of Article L. 356-18, they shall draw up written policies guaranteeing that the information disclosed meets the requirements of this Title on an ongoing basis.