Business legal entities which, although not required to do so because of their legal form or the size of the group as a whole, publish consolidated accounts, shall comply with the provisions of articles L. 233-16 and L. 233-18 to L. 233-27. In this case, when their annual accounts are certified under the conditions provided for in article L. 823-9, their consolidated accounts are consolidated under the conditions set out in the second paragraph of this article.