(1) The present Convention shall apply to the
following ships engaged on international voyages:
-
(a) ships registered in countries the Governments
of which are Contracting Governments;
-
(b) ships registered in territories to which the
present Convention is extended under Article
20; and
-
(c) unregistered ships flying the flag of a State,
the Government of which is a Contracting Government.
(2) The present Convention shall apply to:
-
(a) new ships;
-
(b) existing ships which undergo alterations or
modifications which the Administration deems to be a substantial variation
in their existing gross tonnage;
-
(c) existing ships if the owner so requests; and
-
(d) all existing ships, twelve years after the
date on which the Convention comes into force, except that such ships,
apart from those mentioned in (b) and (c) of this paragraph, shall
retain their then existing tonnages for the purpose of the application
to them of relevant requirements under other existing International
Conventions.
(3) Existing ships to which the present Convention
has been applied in accordance with sub-paragraph (2)(c) of this Article
shall not subsequently have their tonnages determined in accordance
with the requirements which the Administration applied to ships on
international voyages prior to the coming into force of the present
Convention.