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ANNEX I. Rules for replacement. Section I. —Except as provided in Section 111 of this Annex and Part 111 of the present Treaty, a vessel shall not be replaced before it becomes " over-age." A vessel shall be deemed to be " overage " when the following number of years have elapsed since the date of its completion : (a) For a surface vessel exceeding 3,000 tons (3,048 metric tons) but not exceeding 10,000 tons (1.0,160 metric tons) standard displacement: (i) if laid down before the Ist January, 1920 : 16 years ; (ii) if laid down after the 31st December, 1919 : 20 years. (b) For a surface vessel not exceeding 3,000 tons (3,048 metric tons) standard displacement : (i) if laid down before the Ist January, 1921 : 12 years ; (ii) if laid down after the 31st December, 1920 : 16 years. (c) For a submarine : 13 years. The keels of replacement tonnage shall not be laid down more than three years before the year in which the vessel to be replaced becomes '' over-age " ; but this period is reduced to two years in the case of any replacement surface vessel not exceeding 3,000 tons (3,048 metric tons) standard displacement. The right of replacement is not lost by delay in laying down replacement tonnage. Section IT.—Except as otherwise provided in the present Treaty, the vessel or vessels, whose retention would cause the maximum tonnage permitted in the category to be exceeded, shall, on the completion or acquisition of replacement tonnage, be disposed of in accordance with Annex 11 to this Part 11. Section lII.—In the event of loss or accidental destruction a vessel may be immediately replaced. ANNEX 11. Rules for disposal of Vessels of War. The present Treaty provides for the disposal of vessels of war in the following ways : (i) by scrapping (sinking or breaking up) ; (ii) by converting the vessel to a hulk ; (iii) by converting the vessel to target use exclusively ; (iv) by retaining the vessel exclusively for experimental purposes ; (v) by retaining the vessel exclusively for training purposes. Any vessel of war to be disposed of, other than a capital ship, may either be scrapped or converted to a hulk at the option of the High Contracting Party concerned. Vessels, other than capital ships, which have been retained for target, experimental or training purposes, shall finally be scrapped or converted to hulks. Section I.—Vessels to be scrapped. (a) A vessel to be disposed of by scrapping, by reason of its replacement, must be rendered incapable of warlike service within six months of the date of the completion of its successor, or of the first of its successors if there are more than one. If, however, 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.