(1) For the purposes of this Part, a relevant O-SII is an O-SII, or part of an O-SII, which is -

(a) a ring-fenced body within the meaning of section 142A of FSMA [Section 142A was inserted by section 4(1) of the Financial Services (Banking Reform) Act 2013 (c. 33).];

(b) a large building society; or

(c) a financial holding company or a mixed financial holding company which -

(i) has a ring-fenced body or a large building society as a subsidiary; and

(ii) is required, whether by the PRA by a direction under section 192C of FSMA or otherwise, to comply with the requirements of the capital requirements regulation, CRR rules and Directive 2013/36/EU UK law on a sub-consolidated basis.