1. The controller shall consult the European Data Protection Supervisor prior to processing where a data protection impact assessment under Article 39 indicates that the processing would, in the absence of safeguards, security measures and mechanisms to mitigate the risk, result in a high risk to the rights and freedoms of natural persons and the controller is of the opinion that the risk cannot be mitigated by reasonable means in view of the available technologies and costs of implementation. The controller shall seek the advice of the data protection officer on the need for prior consultation.