Legislative power to remedy ultra vires acts.

1 The Secretary of State may by order make such provision as he considers necessary or expedient in consequence of— a any provision of an Act of the Assembly which is not, or may not be, within the legislative competence of the Assembly; or b any purported exercise by a Minister or Northern Ireland department of his or its functions which is not, or may not be, a valid exercise of those functions. 2 An order under this section may— a make provision having retrospective effect; b make consequential or supplementary provision, including provision amending or repealing any Northern Ireland legislation, or any instrument made under such legislation; c make transitional or saving provision.