(132)Where a group applies for the use of the same internal model to calculate the consolidated group Solvency Capital Requirement as well as the Solvency Capital Requirement of a related insurance or reinsurance undertaking in the group, then Article 231 of Directive 2009/138/EC should apply. In this context, in order to ensure that the group supervisor and the other supervisory authorities concerned effectively cooperate and make an informed joint decision on whether to permit the use of that internal model, it is necessary to set out provisions on the documentation needed and on the procedure for the joint decision on the application.