1. A single supervisor, responsible for coordination and exercise of group supervision (group supervisor), shall be designated from among the supervisory authorities of the Member States concerned.
2. Where the same supervisory authority is competent for all insurance and reinsurance undertakings in a group, the task of group supervisor shall be exercised by that supervisory authority.
In all other cases and subject to paragraph 3, the task of group supervisor shall be exercised:
(a) where a group is headed by an insurance or reinsurance undertaking, by the supervisory authority which has authorised that undertaking;
(b) where a group is not headed by an insurance or reinsurance undertaking, by the following supervisory authority:
(i) where the parent of an insurance or reinsurance undertaking is an insurance holding company or mixed financial holding company, the supervisory authority which has authorised that insurance or reinsurance undertaking,
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