2. Unless otherwise provided for in this Regulation, each NCA shall review, on at least an annual basis, whether a less significant supervised entity or a less significant supervised group fulfils any of the criteria provided for in Article 6(4) of the SSM Regulation. In the case of a less significant supervised group, the relevant NCA of the participating Member State in which the parent undertaking, determined at the highest level of consolidation within the participating Member States, is established shall carry out this review.