Any order made under any provision of this Act may be varied or revoked by a subsequent order made thereunder.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F1

Any order made under any . . . F2 provision of this Act and any regulations made under section one thereof shall be made by statutory instrument which shall be subject to annulment in pursuance of a resolution of either House of Parliament.