The Secretary of State may by order—
amend section 8A or 9A so as to vary the information that must or may be given in cases where that section applies;
amend section 9 or 9A so as to vary the matters in respect of which specified evidence must or may be given in cases where that section applies;
make such provision (including provision amending section 9B or 9E or any other enactment) as the Secretary of State considers appropriate in consequence of provision made under paragraph (a) or (b).
The Secretary of State must consult the Registrar General before making an order under this section.