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Intervention in a personal injuries action. 
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21.—(1) The Supreme Court may, upon an appeal to it in a personal injuries action, invite such persons as it considers appropriate to make submissions to the court— 
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(a) in relation to any matter concerning either liability or damages that it considers to be of exceptional public importance, and 
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(b) if the action belongs to a class of causes of action in which the same or a similar matter arises. 
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(2) The Supreme Court may perform functions under subsection (1), either— 
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(a) upon receiving a request in that behalf from a party to the personal injuries action concerned, or from a person who is not such a party, or 
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(b) where no such request is made. 
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(3) Where a person declines an invitation to make submissions under this section he or she shall inform the court in writing stating his or her reason for so declining. 
  
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