3(1)Subject to sub-paragraph (2) below, where under the immigration laws of any of the Islands, a person is or has been ordered to leave the island and forbidden to return, then, if he is not [a British citizen], this Act shall have effect in relation to him as if the order were a deportation order made against him under this Act.
(2)The Secretary of State shall not by virtue of sub-paragraph (1) above have power to revoke a deportation order made in any of the Islands, but may in any particular case direct that sub-paragraph (1) shall not apply in relation to an order so made; and nothing in this paragraph shall render it unlawful for a person in respect of whom such an order is in force in any of the Islands to enter the United Kingdom on his way from that island to a place outside the United Kingdom.