Article 145 4.

In the event of a change in any of the particulars communicated under point (b), (c) or (d) of paragraph 2, an insurance undertaking shall give written notice of the change to the supervisory authorities of the home Member State and of the Member State where that branch is situated at least one month before making the change so that the supervisory authorities of the home Member State and the supervisory authorities of the Member State where that branch is situated may fulfil their respective obligations under Article 146.