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with the date on which the keel was laid, shall be furnished in respect of such vessel so as to reach all the other High Contracting Parties within one month after the date on which the contract for the acquisition of the vessel was signed. The particulars mentioned in Article 12 (d), (e), and (/) shall be given as therein prescribed. Article 15. At the time of communicating the Annual Programme prescribed by Article 12 (a), each High Contracting Party shall inform all the other High Contracting Parties of all vessels included in His previous Annual Programmes and declarations that have not yet been laid down or acquired, but which it is the intention to lay down or acquire during the period covered by the first-mentioned Annual Programme. Article 16. If, before the keel of any vessel coming within the categories or sub-categories mentioned in Article 12 (a) is laid, any important modification is made in the particulars regarding her which have been communicated under Article 12 (b), information concerning this modification shall be given, and the laying of the keel shall be deferred until at least four months after this information has reached all the other High Contracting Parties. Article 17. No High Contracting Party shall lay down or acquire any vessel of the categories or sub-categories mentioned in Article 12 (a) which has not previously been included in His Annual Programme of construction or declaration of acquisition for the current year or in any earlier Annual Programme or declaration. Article 18. If the construction, modernization, or reconstruction of any vessel coming within the categories or sub-categories mentioned in Article 12 (a), which is for the order of a Power not a party to the present Treaty, is undertaken within the jurisdiction of any High Contracting Party, He shall promptly inform all the other High Contracting Parties of the date of the signing of the contract and shall also give as soon as possible in respect of the vessel all the information mentioned in Article 12 (b), (c), and (d). Article 19. Each High Contracting Party shall give lists of all His minor war vessels and auxiliary vessels, with their characteristics, as enumerated in Article 12 (b), and information as to the particular service for which they are intended, 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; and, so as to reach all the other High Contracting Parties within the month of January in each subsequent year, any amendments in the lists and changes in the information. Article 20. Each of the High Contracting Parties shall communicate to each of the other High Contracting Parties, so as to reach the latter within one month after the date of the coming into force of the present Treaty, particulars, as mentioned in Article 12 (6), of all vessels of the categories or sub-categories mentioned in Article 12 (a), which are then under construction for Him, whether or not such vessels are being constructed within His own jurisdiction, together with similar particulars relating to any such vessels then under construction within His own jurisdiction for a Power not a party to the present Treaty.

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