Article 28a 4.

The assurance report on sustainability reporting shall be signed and dated by the statutory auditor carrying out the assurance of sustainability reporting. Where an audit firm carries out the assurance of sustainability reporting, the assurance report on sustainability reporting shall bear the signature of at least the statutory auditor(s) carrying out the assurance of sustainability reporting on behalf of the audit firm. Where more than one statutory auditor or audit firm have been simultaneously engaged, the assurance report on sustainability reporting shall be signed by all statutory auditors or at least by the statutory auditors carrying out the assurance of sustainability reporting on behalf of every audit firm. In exceptional circumstances, Member States may provide that such signature(s) need not be disclosed to the public if such disclosure could lead to an imminent and significant threat to the personal security of any person.