1. Without prejudice to their powers to take action to ensure compliance with national provisions, the competent authorities in Member States may exercise their existing powers to suspend data flows to DHS in order to protect individuals with regard to the processing of their personal data in the following cases:
(a)
where a competent United States authority has determined that DHS is in breach of the applicable standards of protection; or
(b)
where there is a substantial likelihood that the applicable standards of protection are being infringed, there are reasonable grounds for believing that DHS is not taking or will not take adequate and timely steps to settle the case at issue, the continuing transfer would create an imminent risk of grave harm to data subjects, and the competent authorities in the Member States concerned have made reasonable efforts in the circumstances to provide DHS with notice and an opportunity to respond.
2. Suspension shall cease as soon as the standards of protection are assured and the competent authorities of the Member States concerned are notified thereof.