(a) that its reason for doing so subsists; or (b) that it renounces its right to avail itself of the provisions in question as from a stated date. Article 3 1. The minimum age for admission to any type of employment or work which by its nature or the circumstances in which it is carried out is likely to jeopardise the health, safety or morals of young persons shall not be less than 18 years. 2. The types of employment or work to which paragraph 1 of this Article applies shall be determined by national laws or regulations or by the competent authority, after consultation with the organisations of employers and workers concerned, where such exist. 3. Notwithstanding the provisions of paragraph 1 of this Article, national laws or regulations or the competent authority may, after consultation with the organisations of employers and workers concerned, where such exist, authorise employment or work as from the age of 16 years on condition that the health, safety and morals of the young persons concerned are fully protected and that the young persons have received adequate specific instruction or vocational training in the relevant branch of activity. Article 4 1. In so far as necessary, the competent authority, after consultation with the organisations of employers and workers concerned, where such exist, may exclude from the application of this Convention limited categories of employment or work in respect of which special and substantial problems of application arise. 2. Each Member which ratifies this Convention shall list in its first report on the application of the Convention submitted under article 22 of the Constitution of the International Labour Organisation any categories which may have been excluded in pursuance of paragraph 1 of this Article, giving the reasons for such exclusion, and shall state in subsequent reports the position of its law and practice in respect of the categories excluded and the extent to which effect has been given or is proposed to be given to the Convention in respect of such categories. 3. Employment or work covered by Article 3 of this Convention shall not be excluded from the application of the Convention in pursuance of this Article. Article 5 1. A Member whose economy and administrative facilities are insufficiently developed may, after consultation with the organisations of employers and workers concerned, where such exist, initially limit the scope of application of this Convention. 2. Each Member which avails itself of the provisions of paragraph 1 of this Article shall specify, in a declaration appended to its ratification, the branches of economic activity or types of undertakings to which it will apply the provisions of the Convention. 3. The provisions of the Convention shall be applicable as a minimum to the following: mining and quarrying; manufacturing; construction; electricity, gas and water; sanitary services; transport, storage and communication; and plantations and other agricultural undertakings mainly producing for commercial purposes, but excluding family and small-scale holdings producing for local consumption and not regularly employing hired workers. 4. Any Member which has limited the scope of application of this Convention in pursuance of this Article-(a) shall indicate in its reports under Article 22 of the Constitution of the International Labour Organisation the general position as regards the employment or work of young persons and children in the branches of activity which are excluded from the scope of application of this Convention and any progress which may have been made towards wider application of the provisions of the Convention; (b) may at any time formally extend the scope of application by a declaration addressed to the Director-General of the International Labour Office. Article 6 This Convention does not apply to work done by children and young persons in schools for general, vocational or technical education or in other training institutions, or to work done by persons at least 14 years of age in undertakings, where such work is carried out in accordance with conditions prescribed by the competent authority, after consultation with the organisations of employers and workers concerned, where such exist, and is an integral part of-(a) a course of education or training for which a school or training institution is primarily responsible; (b) a programme of training mainly or entirely in an undertaking, which programme has been approved by the competent authority; or (c) a programme of guidance or orientation designed to facilitate the choice of an occupation or of a line of training. Article 7 1. National laws or regulations may permit the employment or work of persons 13 to 15 years of age on light work which is--

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