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1. Each Member of the International Labour Organisation ratifying the present Convention undertakes to prohibit, with the exceptions provided for in Article 2, the use of white lead and sulphate of lead and of all products containing these pigments, in the internal painting of buildings, except where the use of white lead or sulphate of lead or products containing these pigments is considered necessary for railway stations or industrial establishments by the competent authority after consultation with the employers' and workers' organisations concerned.
2. It shall nevertheless be permissible to use white pigments containing a maximum of 2 per cent, of lead expressed in terms of metallic lead.