4.1.1 The production model of add-on equipment,
for which the approval will apply, should be identical to the equipment,
type-tested in accordance with the performance and test specifications
contained in part 1 or 2 of the annex to these Guidelines. The equipment
should also be type-tested in accordance with the specifications for
environmental testing contained in part 3 of the annex to resolution MEPC.107(49).
4.1.2 Where a range of add-on equipment of the
same design, but of different capacities, requires certification in
accordance with these specifications, the Administration may accept
tests in two capacities within the range, in lieu of tests on every
size, providing that the two tests actually performed are from the
lowest quarter and highest quarter of the range.