1. The FCA may restrict the ability of natural or legal persons to enter into sovereign credit default swap transactions or may limit the value of sovereign credit default swap positions that those persons are permitted to enter into where:

(a) there are adverse events or developments which constitute a serious threat to financial stability or to market confidence in the United Kingdom; and

(b) the measure is necessary to address the threat and will not have a detrimental effect on the efficiency of financial markets which is disproportionate to its benefits.

2. A measure taken under paragraph 1 may apply to sovereign credit default swap transactions of a specific class or to specific sovereign credit default swap transactions. The measure may apply in circumstances or be subject to exceptions specified by the FCA. Exceptions may in particular be specified to apply to market making activities and primary market activities.