(85)Cooperation between resolution authorities should take place both with regard to subsidiary undertakings of Union or third-country groups as with regard to branches of Union or third-country insurance or reinsurance undertakings. Subsidiary undertakings of third-country groups are undertakings established in the Union and are therefore fully subject to Union law, including the application of any resolution tools. It is necessary, however, that Member States retain the right to act in relation to branches of insurance and reinsurance undertakings having their head office in third countries, where the recognition and application of third-country resolution proceedings relating to a branch would endanger the real economy or financial stability in the Union, or where Union policy holders would not receive equal treatment with third-country policy holders. In those circumstances, Member States should have the right, after having consulted their resolution authorities, to refuse recognition of third-country resolution proceedings.