4.2.1 For unlimited operation, all vessels must
be classed.
4.2.2 For operation within the Short Range Yacht
Category, all new vessels must be classed.
4.2.3 Existing un-classed vessels of less than
500GT may be considered for restricted operation within the Short
Range Category.
4.2.4 Attention should be paid to local or global
hull strength requirements for the provision of ballast.