Member States' legislation shall provide that an undertaking established in a Member State may cover within that State by way of freedom to provide services from an establishment in another Member State at least:
_ the commitments within the meaning of Article 10, where they are entered into in accordance with the arrangements in Article 13,
_ the commitments within the meaning of Article 10 entered into in accordance with arrangements other than those laid down in Article 13, where they fall within classes in respect of which the undertaking established in the first Member State lacks authorization there in accordance with Article 6 of the First Directive.
If, however, in the latter case that undertaking has such authorization, the first Member State may prevent such provision of services.