(1) Under Article 6(2) of the International Load Line Convention, when a ship “embodies features of a novel kind” it may be exempted from compliance with any provision of the Convention application of which might seriously impede research into the development of such features and their incorporation in ships engaged on international voyages; and (2) under Article 6(4) of the Convention, when a ship not normally engaged on international voyages makes a one-off international voyage.