1.The calculation of the solvency at the level of the group of the insurance and reinsurance undertakings referred to in Article 213(2)(a) shall be carried out in accordance with the technical principles and one of the methods set out in Articles 221 to 233.
2.Member States shall provide that the calculation of the solvency at the level of the group of insurance and reinsurance undertakings referred to in Article 213(2)(a) shall be carried out in accordance with method 1, which is laid down in Articles 230 to 232.
However, Member States shall allow their supervisory authorities, where they assume the role of group supervisor with regard to a particular group, to decide, after consulting the other supervisory authorities concerned and the group itself, to apply to that group method 2, which is laid down in Articles 233 and 234, or a combination of methods 1 and 2, where the exclusive application of method 1 would not be appropriate.