Powers of courts or tribunals to vary retrospective decisions.

1 This section applies where any court or tribunal decides that— a any provision of an Act of the Assembly is not within the legislative competence of the Assembly; or b a Minister or Northern Ireland department does not have the power to make, confirm or approve a provision of subordinate legislation that he or it has purported to make, confirm or approve. 2 The court or tribunal may make an order— a removing or limiting any retrospective effect of the decision; or b suspending the effect of the decision for any period and on any conditions to allow the defect to be corrected. 3 In deciding whether to make an order under this section, the court or tribunal shall (among other things) have regard to the extent to which persons who are not parties to the proceedings would otherwise be adversely affected. 4 Where a court or tribunal is considering whether to make an order under this section, it shall order notice of that fact to be given to— a the Attorney General for Northern Ireland; and b where the decision mentioned in subsection (1) relates to a devolution issue (within the meaning of Schedule 10), the appropriate authority, unless the person to whom the notice would be given is a party to the proceedings. 5 A person to whom notice is given under subsection (4) or, where such notice is given to the First Minister and the deputy First Minister, those Ministers acting jointly may take part as a party in the proceedings so far as they relate to the making of the order. 6 Paragraphs 37 and 38 of Schedule 10 apply with necessary modifications for the purposes of subsections (4) and (5) as they apply for the purposes of that Schedule. 7 In this section “ the appropriate authority ” means— a in relation to proceedings in Northern Ireland, the Advocate General for Northern Ireland and ; b in relation to proceedings in England and Wales, the Attorney General; c in relation to proceedings in Scotland, the Lord Advocate and the Advocate General for Scotland.