1. Member States shall, where processing is to be carried out on behalf of a controller, provide for the controller to use only processors providing sufficient guarantees to implement appropriate technical and organisational measures in such a manner that the processing will meet the requirements of this Directive and ensure the protection of the rights of the data subject.

2. Member States shall provide for the processor not to engage another processor without prior specific or general written authorisation by the controller. In the case of general written authorisation, the processor shall inform the controller of any intended changes concerning the addition or replacement of other processors, thereby giving the controller the opportunity to object to such changes.