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Article 21. (1) At the time of communicating His initial Annual Programme of construction and declaration of acquisition, each High Contracting Party shall inform each of the other High Contracting Parties of any vessels of the categories or sub-categories mentioned in Article 12 (a) which have been previously authorized and which it is the intention to lay down or acquire during the period covered by the said Programme. (2) Nothing in this Part of the present Treaty shall prevent any High Contracting Party from laying down or acquiring, at any time during the four months following the date of the coming into force of the Treaty, any vessel included, or to be included, in His initial Annual Programme of construction or declaration of acquisition, or previously authorized: provided that the information prescribed by Article 12 (b) concerning each vessel shall be communicated so as to reach all the other High Contracting Parties within one month after the date of the coming into force of the present Treaty. (3) If the present Treaty should not come into force before the Ist May, 1937, the initial Annual Programme of construction and declaration of acquisition, to be communicated under Articles 12 (a) and 14, shall reach all the other High Contracting Parties within one month after the date of the coming into force of the present Treaty. PART IV. GENERAL AND SAFEGUARDING CLAUSES. Article 22. No High Contracting Party shall, by gift, sale, or any mode of transfer, dispose of any of His surface vessels of war or submarines in such a manner that such vessel may become a surface vessel of war or a submarine in any foreign navy. This provision shall not apply to auxiliary vessels. Article 23. (1) Nothing in the present Treaty shall prejudice the right of any High. Contracting Party, in the event of ioss or accidental destruction of a vessel, before the vessel in question has become over age, to replace such vessel by a vessel of the same category or sub-category as soon as the particulars of the new vessel mentioned in Article 12 (b) shall' have reached all the other High Contracting Parties. (2) The provisions of the preceding paragraph shall also govern the immediate replacement, in such circumstances, of a light surface vessel of sub-category (6) exceeding 8,000 tons (8,128 metric tons) standard displacement, or of a light surface vessel of sub-category (a), before the vessel in question has become over age, by a light surface vessel of the same sub-category of any standard displacement up to 10,000 tons (10,160 metric tons). Article 24. (1) If any High Contracting Party should become engaged in war, such High Contracting Party may, if He considers the naval requirements of His defence are materially affected, suspend, in so far as He is concerned, any or all of the obligations of the present Treaty, provided that He shall promptly notify the other High Contracting Parties that the circumstances require such suspension, and shall specify the obligations it is considered necessary to suspend. (2) The other High Contracting Parties shall in such case promptly consult together, and shall examine the situation thus presented with a view to agreeing as to the obligations of the present Treaty, if any, which each of the said High Contracting Parties may suspend. Should such consultation not produce agreement, any of the -said High Contracting Parties may suspend, in so far as He is concerned, any or all of the obligations of the present Treaty, provided that He shall promptly give notice to the other High Contracting Parties of the obligations which it is considered necessary to suspend,

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