1. Prior to reaching a joint decision with other supervisory authorities concerned, as referred to in Article 231(2) of Directive 2009/138/EC, the group supervisor shall consult the other supervisory authorities involved in the assessment of the application, referred to in Article 343(2) of this Regulation.

2. The joint decision by the supervisory authorities concerned shall be provided in an official language of the Member State of the group supervisor. The group supervisor shall provide the applicant and each supervisory authority concerned with the decision translated in an official language of the Member State where the applicant has its head office. Each related insurance or reinsurance undertaking applying for the use of the group internal model to calculate their Solvency Capital Requirement shall be provided with the joint decision or, where relevant, with a translation of that decision, by the supervisory authority having authorised that undertaking.

3. In the joint decision, the supervisory authorities concerned may require the applicant to submit a realistic transitional plan to extend the scope of the group internal model.