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4. The foregoing provisions of this Article shall be without prejudice to such measures as the competent authority may think it necessary or desirable to take for the safeguarding of motherhood and for ensuring the health, safety and welfare of woman workers. Part VII. —Education and Training Article 19 1. Adequate provision shall be made in non-metropolitan territories, to the maximum extent possible under local conditions, for the progressive development of broad systems of education, vocational training, and apprenticeship, with a view to the effective preparation of children and young persons of both sexes for a useful occupation. 2. Territorial laws or regulations shall prescribe the school leaving age and the minimum age for and conditions of employment. 3. In order that the child population may be able to profit by existing facilities for education and in order that the extension of such facilities may not be hindered by a demand for child labour, the employment of persons below the school leaving age during the hours when the schools are in session shall be prohibited, in areas where educational facilities are provided on a scale adequate for the majority of the children of school age. Article 20 1. In order to secure high productivity through the development of skilled labour in non-metropolitan territories training in new techniques of production shall be provided in suitable cases in local, regional, or metropolitan centres. 2. Such training shall be organized by or under the supervision of the competent authorities, in consultation with the employers' and workers' organizations of the territory from which the trainees come and of the country of training. Part VIII. —Miscellaneous Provisions Article 21 1. In respect of the territories covered by paragraph 1 of Article 1 of this Convention, each member of the Organization which ratifies this Convention shall append to its ratification, or communicate to the Director-General of the International Labour Office as soon as possible after ratification, a declaration stating—(a) The territories in respect of which it undertakes that the provisions of the Convention shall be applied without modification : (b) The territories in respect of which it undertakes that the provisions of the Convention shall be applied subject to modifications together with details of the said modifications : (c) The territories in respect of which the Convention is inapplicable and in such cases the grounds on which it is inapplicable: (d) The territories in respect of which it reserves its decision. 2. The undertakings referred to in subparagraphs (a) and (6) of paragraph 1 of this Article shall be deemed to be an integral part of the ratification and shall have the force of ratification. 3. Any member may at any time by a subsequent declaration cancel in whole or in part any reservations made in its original declaration in virtue of subparagraphs (6), (c), or (d) of paragraph 1 of this article. 4. Any member may, at any time at which the Convention is subject to denunciation in accordance with the provisions of Article 27, communicate to the Director-General a declaration modifying in any other respect the terms of any former declaration and stating the present position in respect of such territories as it may specify.

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