(1) The diagnosis of pneumoconiosis shall be carried out with all the necessary technical guarantees. Proof of the degree of development of the pathological or anatomical changes in the respiratory and cardiac systems shall be furnished by the radiographic record and other laboratory records, which shall be accompanied by the report of a full clinical examination, including a report of the industrial history of the person concerned, the record of all occupations in which he has been employed, the nature of the harmful dusts to which he was exposed and the duration of such exposure.
(2) For entitlement to compensation, silocosis and coal miners‟ pneumoconiosis shall fulfil the following radiological and clinical conditions :
(a) The radiological examination of the workmen must reveal—
(t) the appearance of generalised micronodular or nodular fibrosis covering a considerable part of both lung fields whether accompanied or not by signs of pulmonary tuberculosis ; or
(it) in addition to a marked accentuation of the pattern of both lungs, the appearance of one or several pseudoiumoral fibrotic formations, whether accompanied or not by signs of pulmonary tuberculosis;
(tit) the appearance of both of these types of fibrotic lesions at once, whether accompanied or not by signs of pulmonary tuberculosis;
(b) Serial radiological pictures taken over a period during periodical medical examinations shall, as far as possible, be considered in making definite diagnosis in cases where doubt exists;
(c) Radiological interpretation shall be based on the standard International classification laid down by the International Labour Organisation (Geneva classification);
(J) The clinical examination of the workman concerned must reveal a decrease or deterioration of the respiratory function or cardiac function, or a deterioration of the state of general health, caused by the pathological processes specified above.