(1)If it appears to Her Majesty that the immunities and privileges conferred by this Part of this Act in relation to any State—
(a)exceed those accorded by the law of that State in relation to the United Kingdom ; or
(b)are less than those required by any treaty, convention or other international agreement to which that State and the United Kingdom are parties,
Her Majesty may by Order in Council provide for restricting or, as the case may be, extending those immunities and privileges to such extent as appears to Her Majesty to be appropriate.
(2)Any statutory instrument containing an Order under this section shall be subject to annulment in pursuance of a resolution of either House of Parliament.