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For the purpose of this Convention-
(a) the term “asbestos” means the fibrous form of mineral silicates belonging to rock-forming minerals of the serpentine group, i.e. chrysotile (white asbestos), and of the amphibole group, i.e. actinolite, amosite (brown asbestos, cummingtonite-grunerite), anthophyllite, crocidolite (blue asbestos), tremolite, or any mixture containing one or more of these;
(b) the term “asbestos dust” means airborne particles of asbestos or settled particles of asbestos which are liable to become airborne in the working environment;
(c) the term “airborne asbestos dust” means, for purposes of measurement, dust particles measured by gravimetric assessment or other equivalent method;
(d) the term “respirable asbestos fibres” means asbestos fibres having a diameter of less than 3 µm and a length-to-diameter ratio greater than 3:1. Only fibres of a length greater than 5 μm shall be taken into account for purposes of measurement;
(e) the term “exposure to asbestos” means exposure at work to airborne respirable asbestos fibres or asbestos dust, whether originating from asbestos or from minerals, materials or products containing asbestos;
(f) the term “workers” includes the members of production cooperatives;
(g) the term “workers' representatives” means the workers' representatives recognised as such by national law or practice, in conformity with the Workers' Representatives Convention, 1971.