His Majesty may by Order in Council direct that the provisions of this Act shall apply, subject to such exceptions and modifications as may be prescribed by the Order, in relation to vessels or aircraft as they apply in relation to land :

Provided that Part I of this Act shall not be applied by any such Order in Council in relation to vessels employed in trading or going between a place in the United Kingdom, the Channel Islands or the Isle of Man and a place not within the United Kingdom, the Channel Islands or the Isle of Man.

Any Order in Council made under this section may be varied or revoked by a subsequent Order in Council.