(1) Any ship embodying features of a novel kind if the development of those features and their incorporation in ships on international voyages might be seriously impeded if the ship had to comply with all the requirements of the Regulations;
and (2) any ship plying on international voyages between near neighbouring ports if, in the opinion of the MCA and the Government of the other country or countries involved, the sheltered nature and condition of the voyages makes it unreasonable or impracticable to apply the Regulations; (3) a UK ship which does not normally ply on international voyages but which is, in exceptional circumstances, required to undertake a single international voyage (in which case she may be exempted for that voyage only); (4) a ship which is not a “Convention-size ship” (i. e. under 24m in length); and (5) any other ship which does not ply on international voyages.
