(10)As a result, the taking up and the pursuit of the business of reinsurance are subject to the grant of a single official authorisation issued by the competent authorities of the Member State in which a reinsurance undertaking has its head office. Such authorisation enables an undertaking to carry on business throughout the Community, under the right of establishment or the freedom to provide services. The Member State of the branch or of the provision of services may not require a reinsurance undertaking which wishes to carry on reinsurance business in its territory and which has already been authorised in its home Member State to seek fresh authorisation. Furthermore a reinsurance undertaking which has already been authorised in its home Member State should not be subject to additional supervision or checks related to its financial soundness performed by the competent authorities of an insurance undertaking which is reinsured by that reinsurance undertaking. In addition, Member States should not be allowed to require a reinsurance undertaking authorised in the Community to pledge assets in order to cover its part of the cedant's technical provisions. The conditions for the granting or withdrawal of such authorisation should be defined. The competent authorities should not authorise or continue the authorisation of a reinsurance undertaking which does not fulfil the conditions laid down in this Directive.