1. Subject to Article 13, each Member State within whose territory an undertaking intends, by way of freedom to provide services, to cover commitments within the meaning of Article 10 may make the taking-up of such activity conditional on official authorization insofar as the commitments are not entered into in accordance with the arrangements referred to in Article 13; to that end, it may require that the undertaking:
(a) produce a certificate issued by the competent authorities of the head office Member State certifying that it possesses for its activities as a whole the minimum solvency margin calculated in accordance with Article 19 of the First Directive and that, in accordance with Article 6(1) of the said Directive, the authorization enables the undertaking to operate outside the Member State of establishment;
(b) produce a certificate issued by the competent authorities of the Member State of establishment indicating the classes in respect of which the undertaking is autho