(1) When the characteristics of a ship, such as
V, Vc, d, N1 or N2 as defined in Regulations 3 and 4,
are altered and where such an alteration results in an increase in
its net tonnage as determined in accordance with the provisions of Regulation 4, the net tonnage of the ship corresponding
to the new characteristics shall be determined and shall be applied
without delay.
(2) A ship to which load lines referred to in
sub-paragraphs (2) (a) and (2) (b) of Regulation
4 are concurrently assigned shall be given only one net tonnage
as determined in accordance with the provisions of Regulation
4 and that tonnage shall be the tonnage applicable to the appropriate
assigned load line for the trade in which the ship is engaged.
(3) When the characteristics of a ship such as
V, Vc, d, N1 or N2 as defined in Regulations 3 and 4 are
altered or when the appropriate assigned load line referred to in
paragraph (2) of this Regulation is altered due to the change of the
trade in which the ship is engaged, and where such an alteration results
in a decrease in its net tonnage as determined in accordance with
the provisions of Regulation 4, a new
International Tonnage Certificate (1969) incorporating the net tonnage
so determined shall not be issued until twelve months have elapsed
from the date on which the current Certificate was issued; provided
that this requirement shall not apply:
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(a) if the ship is transferred to the flag of
another State, or
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(b) if the ship undergoes alterations or modifications
which are deemed by the Administration to be of a major character,
such as the removal of a superstructure which requires an alteration
of the assigned load line, or
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(c) to passenger ships which are employed in the
carriage of large numbers of unberthed passengers in special trades,
such, for example, as the pilgrim trade.