(1) Where the Bank is the group supervisor, it may invite the supervisory authorities of the Member State in which a parent undertaking has its head office, and which do not themselves exercise the group supervision pursuant to Regulation 248, to request from the parent undertaking any information which would be relevant for the exercise of its co-ordination rights and duties as laid down in Regulation 249, and to transmit that information to the Bank.

(2) Where the Bank is the group supervisor, it shall, when it needs information referred to in Regulation 255 which has already been given to another supervisory authority, contact that supervisory authority whenever possible in order to prevent duplication of reporting to the various authorities involved in supervision.