(1) The PRA may require an institution, a UK parent financial holding company, or a UK parent mixed financial holding company (a "relevant entity") to hold additional Common Equity Tier 1 capital ("a systemic risk buffer") in relation to some or all of the exposures referred to in regulation 34G, in order to prevent or mitigate macro-prudential or systemic risks which are not covered -

(a) under the capital requirements regulation; or

(b) by the countercyclical capital buffer, the G-SII buffer or the O-SII buffer provided for in these Regulations.

(2) If the PRA imposes a requirement on a relevant entity under paragraph (1), the PRA must specify -

(a) the exposures or subset of exposures to which that requirement relates;

(b) the buffer rate to be applied to those exposures.

(3) The only buffer rates that the PRA may specify for the purposes of paragraph (2) are 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% and 5%.