1. Where an undertaking included in a consolidation manages another undertaking jointly with one or more undertakings not included in that consolidation, Member States may permit or require the inclusion of that other undertaking in the consolidated financial statements in proportion to the rights in its capital held by the undertaking included in the consolidation.
2. Article 23(9) and (10) and Article 24 shall apply mutatis mutandis to the proportional consolidation referred to in paragraph 1 of this Article.