1. In the case of a personal data breach, the controller shall notify without undue delay and, where feasible, not later than 72 hours after having become aware of it, the personal data breach to the European Data Protection Supervisor, unless the personal data breach is unlikely to result in a risk to the rights and freedoms of natural persons. Where the notification to the European Data Protection Supervisor is not made within 72 hours, it shall be accompanied by reasons for the delay.

2. The notification referred to in paragraph 1 shall at least:

(a) describe the nature of the personal data breach including, where possible, the categories and approximate number of data subjects concerned and the categories and approximate number of operational personal data records concerned;

(b) communicate the name and contact details of the Data Protection Officer;

(c) describe the likely consequences of the personal data breach;

(d) describe the measures taken or proposed to be taken by the controller to address the personal data breach, including, where appropriate, measures to mitigate its possible adverse effects.