the completion of the new vessel or vessels be delayed, the work of rendering the old vessel incapable of warlike service shall, nevertheless, be completed within four and a half years from the date of laying the keel of the new vessel, or of the first of the new vessels; but should the new vessel, or any of the new vessels, be a surface vessel not exceeding 3,000 tons (3,048 metric tons) standard displacement, this period is reduced to three and a half years.
(b) A vessel to be scrapped shall be considered incapable of warlike service when there shall have been removed and landed or else destroyed in the ship:
(1) all guns and essential parts of guns, fire control tops and revolving parts of all barbettes and turrets;
(2) all hydraulic or electric machinery for operating turrets;
(3) all fire control instruments and rangefinders;
(4) all ammunition, explosives, mines and mine rails;
(5) all torpedoes, war heads, torpedo tubes and training racks;
(6) all wireless telegraphy installations;
(7) all main propelling machinery, or alternatively the armoured conning tower and all side armour plate;
(8) all aircraft cranes, derricks, lifts and launching apparatus. All landing-on or flying-off platforms and decks, or alternatively all main propelling machinery;
(9) in addition, in the case of submarines, all main storage batteries, air compressor plants and ballast pumps.
(c) Scrapping shall be finally effected in either of the following ways within twelve months of the date on which the work of rendering the vessel incapable of warlike service is due for completion:
(1) permanent sinking of the vessel;
(2) breaking the vessel up; this shall always include the destruction or removal of all machinery, boilers and armour, and all deck, side and bottom plating.
Section II. Vessels to be converted to hulks
A vessel to be disposed of by conversion to a hulk shall be considered finally disposed of when the conditions prescribed in Section I, paragraph (b), have been complied with, omitting subparagraphs (6), (7) and (8), and when the following have been effected:
(1) mutilation beyond repair of all propeller shafts, thrust blocks, turbine gearing or main propelling motors, and turbines or cylinders of main engines;
(2) removal of propeller brackets;
(3) removal and breaking up of all aircraft lifts, and the removal of all aircraft cranes, derricks and launching apparatus.
The vessel must be put in the above condition within the same limits of time as provided in Section I for rendering a vessel incapable of warlike service.
Section III. Vessels to be converted to target use
(a) A vessel to be disposed of by conversion to target use exclusively shall be considered incapable of warlike service when there have been removed and landed, or rendered unserviceable on board, the following:
(1) all guns;
(2) all fire control tops and instruments and main fire control communication wiring;
(3) all machinery for operating gun mountings or turrets;
(4) all ammunition, explosives, mines, torpedoes and torpedo tubes;
(5) all aviation facilities and accessories.
The vessel must be put into the above condition within the same limits of time as provided in Section I for rendering a vessel incapable of warlike service.
(b) In addition to the rights already possessed by each High Contracting Party under the Washington Treaty, each High Contracting Party is permitted to retain, for target use exclusively, at any one time:
