employment or work in respect of which special and substantial problems of application arise. 4. (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. 4. (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 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. 5. (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. 5. (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. 5. (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;