EBU Single Rulebook Q&A 13 June 2017 2017_3342 O-SII Buffer on individual and consolidated level

Article 131(5) of the CRD (Directive 2013/36/EU) states that “the competent authority or designated authority may require each O-SII, on a consolidated or sub-consolidated or individual basis, as applicable, to maintain an O-SII buffer..”. May the competent authority or designated authority also require a single O-SII to maintain an O-SII buffer both on a consolidated AND individual basis?