Where the participating insurance undertaking, reinsurance undertaking, insurance group company, mutual group association, social protection group company or mixed financial holding company referred to in Article L. 356-2 is itself a subsidiary undertaking of another insurance or reinsurance undertaking, another insurance group company, another mutual group association, another social protection insurance group company or another mixed financial holding company which has its head office in the European Union, the provisions of Sections II, III, IV, V and VI of this Chapter apply only at the level of the ultimate parent undertaking at EU level.