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Article 11. For the effective enforcement of the provisions of this Convention, — 1. The necessary measures shall be taken to ensure adequate inspection. 2. Every employer shall be required — (a) To notify, by the posting of notices in conspicuous positions in the establishment or other suitable place, or by such method as may be approved by the competent authority, the times at which hours of work begin and end, and, where work is carried on by shifts, the times at which each shift begins and ends : (b) To notify in the same way the rest periods granted to the persons employed which, in accordance with Article 2, are not included in the hours of work : (c) To keep a record in the form prescribed by the competent authority of all additional hours of work performed in pursuance of paragraph 2 of Article 7 and of the payments made in respect thereof. 3. It shall be made an offence to employ any person outside the times fixed in accordance with paragraph 2 (a) or during the periods fixed in accordance with paragraph 2 (b) of this article. Article 12. Each member which ratifies this Convention shall take the necessary measures in the form of penalties to ensure that the provisions of the Convention are enforced. •t Article 13. The formal ratifications of this Convention under the conditions set forth in Part XIII of the Treaty of Versailles and in the corresponding parts of the other treaties of peace shall be communicated to the Secretary-General of the League of Nations for registration. Article 14. This Convention shall be binding only upon those members whose ratifications have been registered with the Secretariat. It shall come into force twelve months after the date on which the ratifications of two members of the International Labour Organization have been registered with the Secretary-General. Thereafter, this Convention shall come into force for any member twelve months after the date on which its ratification has been registered. Article 15. As soon as the ratifications of two members of the International Labour Organization have been registered with the Secretariat, the Secretary-General of the League of Nations shall so notify all the members of the International Labour Organization. He shall likewise notify them of the registration of ratifications which may be communicated subsequently by other members of the organization. Article 16. A member which has ratified this Convention may denounce it after the expiration of ten years from the date on which the Convention first comes into force, by an act communicated to the SecretaryGeneral of the League of Nations for registration. Such denunciation shall not take effect until one year after the date on which it is registered with the Secretariat. & Each member which has ratified this Convention and which does not, within the year following the expiration of the period of ten years mentioned in the preceding paragraph, exercise the right of denunciation provided for in this article, will be bound for another period of five years, and thereafter may denounce this Convention at the expiration of each period of five years under the terms provided for in this article. Article 17. At the expiration of each period of ten years after the coming into force of this Convention the Governing Body of the International Labour Office shall present to the General Conference a report on the working of this Convention, and shall consider the desirability of placing on the agenda of the Conference the question of its revision in whole or in part. Article 18. Should the Conference adopt a new Convention revising this Convention in whole or in part, the ratification by a member of the new revising Convention shall ipso jure involve denunciation of this Convention without any requirement of delay, notwithstanding the provisions of Article 16 above, if and when the new revising Convention shall have come into force. As from the date of the coming into force of the new revising Convention, the present Convention shall cease to be open to ratification by the members. Nevertheless, this Convention shall remain in force in its actual form and content Jor those members which have ratified it, but have not ratified the revising Convention.

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